Robert, your reply raises a question. The two 12 ga. Trojans I had owned were "users": hunting guns with honest "wear and tear". Just for my learning curve here- let's take a Trojan- mfg. in Meriden 12 gauge DT 30" Mod & Full, and bless it with the good fortune that befell the man who bought Arthur Middleton's NJ house in the 1930's and found the "unfired" 16 Invincible-a almost "virgin" Parker- and set a resale value for today's market- and compare that to the same basics in our trojan, but restored, either by Turnbull or Delgrego, with the attendant paperwork to verify same, and again, set a current value.
I recall reading in Jack O'Connors' "The Shotgun Book" that he described many 12 Trojan and VH parkers as evidencing heavy wear- and a comment along these lines: "The fellow who bought a high grade gun usually took very good care of it"-- possibly so--
