Question: WHen did Kano give first grades?
About the article "Judo", section "Founding of the Kodokan".

Candidate passages:
Muhammad Rumfa ascended to the throne in 1463 amidst the First Interregnum, The Rise of Askiyya the Great in Songhai forced him take the Askiyyah's Daughter ; Auwa as wife, she soon was to the first female Madaki of Kano and after a brief succession struggle on the Death of Rumfa in 1499, Auwa was to guide her Son Muhammadu Kisoki (reigned 1509-1565) in another wave of Conquest to restore the standing of the Sultanate.
According to the Kano Chronicle, the thirty-seventh Sarkin Kano (King of Kano) was Mohammed Sharef (1703–1731).
His successor, Kumbari dan Sharefa (1731–1743), engaged in major battles with the Sokoto Caliphate.
Sokoto finally established control when Muhammadu Bakatsine, Leader of Jobe Clan of Fulani rebelled against Muhammad al-Walid, the last sultan of Kano.
He was eventually deposed in 1805 and killed in 1807, Kano then became an emirate subject to Sokoto. 
Mallam Aminu Kano International Airport is the oldest in Nigeria, with operations starting in 1936.
In the first decades of operation, it became an important fuel stop for airlines flying long-haul services between Europe and Africa.
Newer aircraft did not need such fuel stops any longer and, with the demise of the economy of Kano in the late 20th century, many international airlines stopped serving the airport.
Until May 2012, KLM was the only European airline serving Kano, which they had done without interruption since 1947.
This makes KLM the longest-serving foreign airline in Nigeria.
The bulk of international flights cater for the large Lebanese community in Kano and Muslim pilgrimages to Mecca. 
Dantata later returned to Bebeji, and began using steamships to transport kola nuts between Accra and Lagos.
He later diversified his trade into items such as beads and necklaces, and bought a house in the Koki ward of Kano.
He married Umma Zaria, and she conducted business for him with women (him not doing it for religious reasons).
In 1918, the UK-based Royal Niger Company searched for an agent to purchase groundnuts for them, and Dantata responded to their offer.
Alhassan remained in Bebeji until matters had settled down and the roads were secure, only then did he set out for Accra, by way of Ibadan and Lagos (Ikko) and then by sea to Accra and then to Kumasi, Sekondi and back to Lagos.
Alhassan was one of the pioneers of this route.
For several years, he carried his kola by sea, using steamers; to Lagos where he usually sold it to Kano bound merchants.
By this time, he was relatively wealthy.
In 1906, he began broadening his interests by trading in beads, necklaces, European cloth, etc.
His mother, who had never remarried, died in Accra around 1908 and he thereafter generally restricted his operations to Lagos and Kano, although he continued to visit Accra.
Thus far in his career, with most of his fellow long distance traders, he continued to live in one of the towns some distance from Kano City, only visiting the Birni for business purposes.
Before Alhassan settled in Kano permanently, he visited Kano City only occasionally to either purchase or sell his wares.
He did not own a house there, but was satisfied with the accommodation given to him by his patoma (land lord.).
It was during the time of the first British appointed Emir of Kano; Abbas (1903–1919) that Alhassan decided to establish a home in Kano.
He purchased his first house in the Sarari area (an extension of Koki).
At that time there were no houses from the house of Baban Jaki (at the end of Koki) up to Kofar Mazugal.
In fact the area was called Sarari because it was empty and nobody wanted that land.
Alhassan built his first house on that land and was able thereafter to extend it freely.
In 1912, when the Europeans started to show an interest in the export of groundnut, they contacted the already established Kano merchants through the Emir, Abbas and their chief agent, Adamu Jakada.
Some established merchants of Kano like Umaru Sharubutu, Maikano Agogo and others were approached and accepted the offer.
Later in 1918, Alhassan was approached by the Niger Company to help purchase groundnuts for them.
He was already familiar with the manner by which people made fortunes by buying cocoa for Europeans in the Gold Coast.
He responded and participated in the enterprise with enthusiasm, he had several advantages over other Kano business men: he could speak some English because of his contact with the people on the coast, thus he could negotiate more directly with the European traders for better prices.
He also had accumulated a large capital and unlike other established Kano merchants, had only a small family to maintain, as he was still a relatively young man.
Alhassan had excellent financial management, was frugal and unostentatious.
He knew some accounting and with the help of Alhaji Garba Maisikeli, his financial controller for 38 years, every kobo was accounted for every day.
Not only that, Alhassan was hard working and always around to provide personal supervision of his workers.
As soon as he entered the groundnut purchasing business, he came to dominate the field.
In fact by 1922 he became the wealthiest businessman in Kano.
Umaru Sharubutu and Maikano Agogo were relegated to the second and the third positions respectively.
When the British Bank of West Africa was opened in Kano in 1929, he became the first Kano businessman to utilize a bank account when he deposited twenty camel loads of silver coins.
Shortly before his death, he pointed to sixty "groundnut pyramids" in Kano and said, "These are all mine".
Alhassan became the chief produce buyer especially of groundnuts for the Niger Company (later U.A.C).
It is said that he used to purchase about half of all the nuts purchased by U.A.C in northern Nigeria.
Because of this, he applied for a license to purchase and export groundnuts in 1940 just like the U.A.C.
However, because of the great depression and the war situation, it was not granted.
Even Saul Raccah lost his license to export and import about this time because he did not belong to the Association of West African Merchants.
In 1953-4 he became a licensed buying agent (L.B.A) that is, a buyer who sells direct to the marketing board instead of to another firm.
However, Alhassan had many business connections both in Nigeria and in other West African countries, particularly the Gold Coast.
He dealt, not only in groundnuts, but also in other merchandise.
He traded in cattle, kola, cloth, beads, precious stones, grains, rope and other things.
His role in the purchase of kola nuts from forest areas of Nigeria for sale in the North was so great, that eventually whole "kola trains" from the Western Region were filled with his nuts alone. 
Kano had an almost symbiotic relationship with Alpha's Main Computer, which was curiously programmed with a female voice.
He also referred to the computer as 'Computer' instead of "the computer" as though it were a name.
He also habitually referred to Computer as 'she' or 'her'.
Kano was invaluable to Commander Koenig as the person who had the ability to ask "Computer" the right questions and was privy to confidential computer output before everyone else.
Kano's faith in computers in general was unshakable and he would tout human error over computer error every time.
Well liked among the Alphans, Kano was an easygoing person who got along well with fellow key staff.
While typically addressed as 'Kano', Paul Morrow was one of the few to address him by given name, indicating that the two probably knew each other for some time.
While not socially inept, Kano perferred to spend most of his time with Computer, often playing chess with her.
He could occasionally be seen playing chess with his fellow Alphans when seeking 'a real game' as he beat Computer every time.
The episode "" marks a notable instance where Kano lost his temper and harshly reprimands a junior staff member who accidentally spills coffee on him.
Morrow also almost comes to blows with Kano over what he perceives as Kano's unnecessary harsh treatment of said junior staff member.
However, everyone at this time is overly stressed due to Commander Koenig's being on the brink of death due to events in that episode.
These harsh exchanges were promptly forgotten when Koenig recovered.
Kano first appeared in Series One's second episode "".
The pilot episode has a similar Black character in the same position, Benjamin Ouma, played by actor Lon Satton.
(An examination of early drafts of the script for "" indicated Ouma was the head of the Computer Section.)
Kano replaced Ouma without any reason given and Ouma was never seen on the show again.
Accounts from cast and crew indicate Satton did not get along with producers and fellow actors alike (especially Martin Landau) and was removed from the series. 
When the Model 1897 was first introduced, the price depended upon what grade was being purchased and what features were being added to that specific gun.
To purchase a plain finished shotgun would cost the buyer $25.
Whereas to have an engraved receiver with checkered and finer wood included, it would cost $100.
The more expensive grades of the Model 1897 were the standard, trap, pigeon, and tournament grades.
These were the grades that were normally equipped with an engraved receiver and with checkered, finer wood.
These grades did not go through the abuse that the other grades went through.
The less expensive and plainer grades were the Brush, Brush Takedown, Riot, and Trench.
These grades were not given the higher valued wood or special designs.
This is because these guns were designed and built for hard abuse.
These grades stood a higher chance of being badly damaged so there was no need to put extra money into them for appearance purposes.
As the functions that were performed with these grades required them to be lightweight it was not beneficial to use heavy and expensive wood when designing them.
Most often, when these grades were purchased, they were purchased in high numbers.
By designing these grades with standard wood and finish, it kept the prices at a lower level.