There may be a lockup type stamp atop the rib and a permission of use stamp on the standing breech.
Greener's 1881 U.S. of A. #242,529 Action Body patent:
http://www.google.com/patents?id=izVGAAA...ner&f=falseGreener may have patented it a year earlier in Britian but Westley Richards took him to task via the British courts in 1881 and lost.
Harry Greener's 1893 U.S. of A. patent # 489,947:
http://www.google.com/patents?id=oE52AAA...ner&f=falseI'm just going from memory, but I though after Greener ceased using the A & D Body Action and won the law suit that his Action Bodys were based on the Facile Princeps, or Easily the Chief. I think there was an Empire & Unique actions but I can't recall much on the Unique. Maybe the Empire designed differed from the Facile Princeps with the omission of a cocking rod or different orientation? There were some Berlin firearms merchants(Max Fisher) and at least 1 Sauer that have that pregnant looking action.
Are the fences defined as the James Dalzell Dougall type?
Kind Regards,
Raimey
rse