This short note will present two documented cases of counterfeiting where sufficient information is included to allow surviving specimens to be identified.
In the first case from Aberdeen in 1799, a counterfeit shilling with an Anne Obverse but with a 1720 reverse, the present author is seeking readers’ help in providing illustrations to complete the note.
In the second case from Portsmouth in 1915, a counterfeit shilling dated 1877, the unusual choice of metal for the counterfeit and its grade when issued makes the surviving pieces stand out from typical counterfeits of the period.”
Two Contemporary Notices of Counterfeiting – Gary Oddie
BNS Research Blog 
The 1799 report in the Aberdeen Press and Journal gives an interesting insight into what was actually in circulation at the end of the 18th century. Presumably genuine coins of Queen Anne were still a common enough sight.