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[Steiner]

Welcome and Congratulations on your longevity. You have a Trojan model Parker with a replacement stock. You can read about the grades of Parker Shotguns through a link found on the home page of this site. The Trojan model was the lowest grade/cost Parker but are similar in most respects to all grades of Parker. The shape of the receiver is distinct and specific to the Trojan. Some of the markings provide information about the gun and there is much uncertainty about others. You can find information on the markings through the home page too. I’m sure someone more knowledgeable than myself will be along shortly to provide the answers to your questions. You might enjoy reading the information about Parker shotguns available via the tabs along the left side of the home page.

[edgarspencer]

Apart from the white line spacers (just a personal preference), it's a pretty good looking stock for not being factory. The JG is the mark of Jim Geary, who was the barrel foreman at the time the gun was made.