12, Stonegate, York

Wehrly & Co. - York - 1906
Trying to work out the origins of this firm, with its strong German connections. was complicated by working backwards, so I'll start at the begining and it will end, I'm sure, being as clear as mud.
In 1790 there was a German clockmaker working in Hull by the name of Matthew Schwerer, by 1813 he had set up business in York. In 1837 the business was passed to his sons, Matthew and Phillip Schwerer who were described as Watchmakers, Jewellers and Silversmiths.
The 1841 census reveals that Phillip Schwerer employed Augustine Kleiser and Andrew Kleiser who was born in Scollach, Baden. In 1842, Matthew and Phillip Schwerer returned to Germany and the business was sold to Augustine Kleiser and Andrew Kleiser who continued to trade as P. Schwerer.
In 1846, Matthew Schwerer returned to York and resumed business, firstly at 18 Stonegate and later at 14 Stonegate.
Returning to the Kleiser's, by 1857, Augustine seems to have left the scene and Andrew was joined by his brother Joseph. Earlier the 1851 census shows the visit of another brother from Germany, Martin. Martin decided to stay and by 1861 had purchased the business of Matthew Schwerer at 14, Stonegate.
The 1871 census has the firm of M. Kleiser & Co., under the management of Bernard Tritschler. The same census has Bernard Tritschler, 12, Stonegate, aged 33 years, born in Scollach, Baden, employing two men, one being Matthew Wehrly and one apprentice, being Severin Heine.
The same 1871 census has Matthew Wehrly, aged 25 years, born Hammereisbach, Baden. By 1881, Matthew Wehrly was the owner of M. Kleiser & Co. as the senior partner, the junior partner was Severin Heine. They were noted as employing one man and two apprentices, one being Roman Wehrly.
Matthew Wehrly's last appearance in the Electoral Register was in 1888. Who the owner of the business was, at the time of the above advertisement in 1906, is unknown, but Roman Wehrly is a possibility.
Much of the above information was filtered from the Directory of York Goldsmiths, Silversmiths & Associated Craftsmen by Hugh Murray.
Theft of a Tray of Rings
A clever piece of shoplifting was effected on the 1st ult, at the establishment of M. Wehrly and Co. Jewelers, Stonegate, York, by a well-dressed man 5ft. 10in, in height, fair complexion, wearing a brown felt hat and a long grey coat, who, making sundry inquiries about the engraving of some souvenir spoons, which necessitated the turning of the back of the member of the firm attending to him, managed to abstract from the window a stand containing twelve rings of the value of £120. Unfortunately the loss was not noticed till late in the evening, when the window case was found unclosed, so that the thief got a good start.
Source: The Watchmaker, Jeweller and Silversmith - 1st December 1893
Trev.