PGCA members have been working at understanding some of these stamps for about 70 years without success. The JG stamp is James Geary, a Parker employee.

Thank you.
 

Thank you! Every little bit brings the gun back to life.

The Kf on the right barrel flat of 130830 is the steel mark equating to Vulcan Steel. On the early steel barrel guns the Kf equates to Vulcan Steel and K is found on both Titanic steel and early Acme Steel barrels. We find the K and Kf steel marks into the 134xxx serial number range in the 135xxx range we begin seeing the letter in a circle steel marks -- V for Vulcan, P for Parker, P.S. for Parker Spec., T for Titanic and A for Acme.

On 196846 the HT over A on the right barrel flat is believed to mean High Tensile Alloy by many and Heat Treated Annealed by others.