Of slightly tapering cylindrical form and with plain sides. The base engraved with contemporary initials I.M
Probably that exhibited by Nicholas Shaw Antiques, Three centuries of York Silver 1550-1858, at the Merchant Adventurers' Hall, York 14th-28th July 2000, No 104. ( The date letter is recorded as 1680 based on Nicholas Shaw's findings that York date letters were 3 years later than previously recorded)
Mary Cooke Antiques, 2017
This is a very good example of a York tumbler having a delightful colour and patination and a particularly thick guage at the rim. It has a typical North Country shape with slightly lower and more vertical sides but wider top. A very similar cup is recorded in the William Lee Collection, see York Silver, A permanent exhibition, York Minster Undercroft, 1972. no.21 and dated 1678. That cup is also attributed to Robert Williamson and is illustrated on an unnumbered page.