He gave the Centenary Clock to his native town of Lier on the hundredth anniversary of Belgium's independence. The Astronomic Studio was opened in 1932. The Centenary Clock is fixed in the front of the Zimmer Tower and the Astronomic Studio is installed on the first floor of it. It covers 9 sections with 57 dial-plates. The Zimmer clock ranks among the world's most famous astronomic clockworks on account of its originality and ingenuity.
Greenwich time can be the same, faster or slower than solar time.
The hand needs one complete year to go round. The Solar Cycle covers a period of 28 years. On the inner circumference, the hand indicates in which year of the Solar Cycle we are, and on the outer circumference you can see the Dominical Letter. There are 31 days on it. Spring is represented by a child with flowers, summer is represented by a mower, autumn is symbolised by a cornucopia and winter is represented by a housewife reading by the fireside.