Fiftynine, also in that 1895 Blake and Lamb catalog there is listed a #15, and a #4 Deer trap. Neither of these two have surfaced either, many times in catalogs, items that were intended to be produced were put into catalogs that may or may not have been produced. Before production on anything begins, the marketing and advertising is always finished before the product, whether it ends up being produced or not.
As Dean pointed out, this is the first time a later model Raised letter pan Blake has surfaced, so for many of us advanced collectors we always assumed that it never was produced until now. The earlier model three circle pan #6 is rare in itself as there are I believe only 5 known examples of that one which was produced from around 1884-85 to around 1894-95 after Chambers death, and his son took over. This was the period when Blake produced its first long spring, "The Oneida Pattern". Before that, as Blake and Lamb started production around 1865, all their traps were the double under springs, which included the double under spring #5 and #6 Blake and Lamb Bear Trap.
Another thing I want to point out is that a price guide is just that, just a guide, and in the Blake Bear trap section, the Blake bear traps are extremely undervalued. As the few people that own the #5 Raised letter and the #6 Three circle pan, were never contacted, or consulted with about price when the guide was put out, and all of us gave more for their Blakes than what they are priced for in the guide.