Summarize the following court judgment. ivil Appeal No. 3041 of 1988. From the Judgment and Order dated 2. 1988 of the Calcutta High Court in Original Order Tender No. (F.M.A.T.) No. 181 of 1987. Dr. Shankar Ghosh	 Mrs. Naresh Bakshi and K.D. Prasad for the Appellants. Ashok H. Desai	 P. Parmeshwaran and A. Subba Rao for the Respondents. The Judgment of the Court was delivered by KULDIP SINGH	 J. M/s Burn Standard Company Limited	 the appellant before us	 is one of the leading manufacturer of wagons. The wagons manufactured and produced by the appellant are primarily supplied to the Railway Board. The wagons are manufactured in 962 accordance with the specifications	 terms and conditions contained in the agreements entered between the appellant and the Railway Board from time to time. It is the admitted case of the parties that the Railway Board supplies wheel sets	 axle boxes and various other finished components of wagons to the appellant which are termed as "free supply items". These items are not manufactured by the appellant. The readymade "free supply items" are made available to the appellant by the Railway Board without charging any price. There items are fitted in the wagons manufactured by the appellant and are ultimately supplied to the Railway Board. The invoice value of the wagon charged by the appellant from the Railway Board does not include the value of the "free supply items". On the above facts	 the short question for our determination is whether the excise duty under Section 3 and 4 of the (hereinafter called `the Act ') is to be charged on the invoice value of the wagon or on the value of completed wagon including that of the "free supply items". The central excise authorities issued various show cause notices in respect of different transactions calling upon the appellant to show cause as to why the excise duty be not computed and charged onthe value of the completed wagon including that of the "Free supply items". The appellant challenged the show cause notices by way of writ petition under Article 226 of the Constitution of India before the Calcutta High Court which was heard by a learned Single Judge who allowed the writ petition and quashed the demand raised by the central excise authorities. The Learned Judge came to the conclusion that the excise duty could only be charged on the basis of the invoice value under the contract. The learned Judge based his conclusions on the following reasoning: "There is no dispute that certain items of finished components are supplied by the Railway Board to the petitioner. The value of these items is not taken into consideration in fixing the price of the wagons sold by the petitioner to the Railway Board. The price of the completed wagons is calculated on the basis of the manufacturing cost of the petitioner including the price of components acquired by the petitioner for which the petitioner has actually to pay the price. But the components which are supplied free of cost by the Railway Board do not enter into the pricing mechanism of the petitioner at all. Therefore	 the excise 963 value of the wagons manufactured by the petitioner cannot be calculated after adding back the price of the components supplied free of cost by the Railway Board. " The Union of India filed appeal against the judgment of the learned Single Judge which was heard by a Division Bench of the Calcutta High Court. The Bench did not agree with the reasoning and conclusions of the learned Single Judge	 set aside his judgment and dismissed the writ petition of the appellant petitioner. The division Bench allowed the appeal in the following words: "Admittedly	 in this case	 the cost of wagon as a whole has not been mentioned in the agreement and we feel that the cost of normal price should include cost of construction and furthermore	 when sale is the charge and the same under charging section of the said Act would mean actual price of the goods viz. wagon as a whole	 so the value of a wagon as a whole	 will form part of the relevant and necessary assessable value under section 4 of the said Act	 as the manufacturing cost of a complete wagon cannot be conceived of without taking into account or consideration the cost of free supply items . We hold that the valuation cost of the free supply items should be included in the manufacturing cost of wagons. We think that section 4(1)(a) of the said Act applies in this case and as such	 the valuation of excisable goods will be charged or will take place when manufacture takes place. Thus	 we also find and hold that while determining the valuation of wagons for charging the duty	 the Revenue Authorities had acted duly and with justification	 in adding the cost of free supply items under the provisions of the said Act as indicated above	 the more so when	 under the agreement in this case	 the said petitioners were and are required to manufacture and supply completed wagons	 in which the free supply items were and are required to be fixed at the time of manufacture. There cannot be any doubt that without fixing the free supply items	 the production and manufacture of a wagon would not be effectively completed. The manufacture of a complete wagon thus takes place as soon as or as and when th free supply items are fitted and fixed by the said petitioners and with such manufacture	 the process of manufacture would be complete under section 2(f) of the said Act and the liability to duty will also be 964 attracted. We hold that the value of the manufactured goods must be determined at the factory gate i.e. at the stage when the manufactured goods here in this case wagons	 leave the factory." The appeal	 against the judgment of the High Court	 via special leave petition is by M/s. Burn Standard Company Limited. The relevant parts of Sections 3 and 4 of the Act are reproduced hereinafter: "3. Duties specified in the First Schedule to be levied (1) There shall be levied and collected in such manner as may be prescribed duties of excise on all excisable goods other than salt which are produced or manufactured in (India) . . 4. Valuation of excisable goods for purposes of charging of duty of excise. (1) Where under this Act	 the duty of excise is chargeable on any excisable goods with reference to value	 such value shall	 subject to the other provisions of this section	 be deemed to be (a) the normal price thereof	 that is to say	 the price at which such goods are ordinarily sold by the assessee to a buyer in the course of wholesale trade for delivery at the time and place of removal	 where the buyer is not a related person and the price is the sole consideration for the sale: . (b) where the normal price of such goods is not ascertainable for the reason that such goods are not sold or for any other reason	 the nearest ascertainable equivalent thereof determined in such manner as may be prescribed. " Section 3 of the Act provides for levy of the duty of excise. It is a levy on goods produced or manufactured in India. Section 4 of the Act lays down the measure by reference to which the duty of excise is to be assessed. The duty of excise is linked and chargeable with reference to the value of the excisable goods and the value is further defined in express terms by the said section. In every case the fundamental crite 965 rion for computing the value of an excisable article is the normal price at which the excisable article or an article of the like kind and quality is sold or is capable of being sold by the manufacturer. It is not disputed that the appellants are manufacturers of wagons. What comes down from the assembly line of the appellant 's factory is a complete wagon and as such the appellant being manufacturer of wagons	 is liable to pay duty of excise on the value of a complete wagon. The "free supply items" like wheel sets etc. in the process of manufacturing become part of the complete wagon and loose their identity. It hardly matters how and in what manner the components of the wagon are procured by the manufacturer	 so long as the appellant is manufacturing and producing the goods called "wagons" it is liable to pay duty of excise on the normal value of the wagon. In Empire Industries Limited and Others vs Union of India and Others	 ; this Court while interpreting Sections 3 and 4 of the Act held as under: "The fact that the petitioners are not the owners of the end product is irrelevant. Taxable event is manufacture not ownership. In M/s. Ujagar Prints and Others vs Union of India and Others	 ; 	 M.N. Venkatachalaih	 J. speaking for the Court observed as under: "Duties of excise are imposed on the production or manufacture of goods and are levied upon the manufacturer or the producer in respect of the commodity taxed. The question whether the producer or the manufacturer is or is not the owner of the goods is not determinative of the liability. " We	 therefore	 cannot accept the contention of the learned counsel for the appellant that the value of the "free supply items" should not be included in the assessable value of the wagons manufactured by the appellant. We see no infirmity in the reasoning and the findings reached by the Division Bench of the High Court. The appeal is	 therefore	 dismissed with no order as to costs. V.P.R. Appeal dismissed.

The appellant company manufactured railway wagons in accordance with the specifications	 terms and conditions contained in the agreements entered between the appellant and the Railway Board from time to time. The Railway Board without charging any price supplied wheel sets	 axle boxes and various other finished components of wagons	 which were termed as "free supply items	 to the appellant, which were used in the manufacture of wagons and supplied the complete wagons to the Railway Board. The invoice value of the wagon charged by the appellant did not include the value of the free supply items. " The central excise authorities issued show cause to the appellant as to why the excise duty be not computed and charged on the value of the complete	 wagon	 including that the "free supply items". The appellant challenged the show cause notices by filing a Writ Petition before the High Court. Holding that the excise duty could only be charged on the invoice value under the contract	 the Single Judge allowed the petition. The appeal filed by the Respondents against the judgment of the Single Judge was allowed by the Division Bench of the Court	 against which the present appeal was made by the appellant company. On the question	 whether the excise duty under sections 3 and 4 of the Central Excise and Salt Act	 1944 was to be charged on the invoice value of the wagon or on the value of completed wagon including that of the "free supply items". Dismissing the appeal	 this Court	 961 HELD: 1. Section 3 of the Act provides for levy of the duty of excise. It is a levy on goods produced or manufactured in India. Section 4 of the Act lays down the measure by reference to which the duty of excise is to be assessed. The duty of excise is linked and chargeable with reference to the value of the excisable good and the value is further defined in express terms by the said section. In every case the fundamental criterion for computing the value of excisable article is the normal price at which the excisable article or an article of the like kind and quality is sold or is capable of being sold by the manufacturer. [940G 965A] 2. What comes down from the assembly line of the appellant 's factory is a complete wagon and as such the appellant being manufacturer of wagons	 is liable to pay duty of excise on the value of a complete wagon. The "free supply items" like wheel sets etc. in the process of manufacturing become part of the complete wagon and loose their identity. It hardly matters how and in what manner the components of the wagon are procured by the manufacturer	 so long as the appellant is manufacturing and producing the goods called "wagons" it is liable to pay duty of excise on the normal value of the wagon. [965A C] Empire Industries Limited and Others vs Union of India and Others	 ; and M/s. Ujagar Prints and Others vs Union of India and Others	 ; 	 followed.