The previous cataloger stated "Although not listed by Wilson and Rasmussen, this is clearly a well struck and carefully finished piece. The dies are well centered, the beaded borders well within the rims and the fields of superior proof-like finish, suggesting that comparison with the proof or presentation five guineas of 1760 (WR 48) would not be amiss. That it should occur for the first year of the denomination's issue may also be significant".
While we completely agree with this analysis we find it also worth mentioning the upset rim present on both obverse and reverse. This characteristic is not normally found on British gold of this era and is indicative of a proof issue. Without question EXTREMELY RARE, perhaps even UNIQUE.
Ex: Dix Noonan Web September 28, 2005 Auction, Lot #706 "The Joanna Tansley Collection of Patterns, Proofs and coining trials" where it hammered for 15,000 British pounds. To the best of our knowledge this was the first place this piece was published as a proof or presentation piece.
Estimate: $15000.00- $20000.00