Have a receiver but cannot determine gauge, beautiful though!

[John Knobelsdorf II]

Like numerous examples of the more common grades, 182745 may not be in the Price & Fjestad serialization book - there are surviving factory records for a letter.

See the Research Letters page, and find that link on the left hand side of the PGCA Home page.

[Bill Murphy]

The only thing you have to know about a Trojan receiver to determine its gauge is the distance between the firing pins. All other dimensions are extra. Page 527 of The Parker Story will give you the firing pin separation figures.