Colt Automatic Pistol and Revolver Information - 25 years of Service to Colt Firearms Collectors

COLT MODELS Gun of the Month - May 2010
Colt 1911 Military
Serial Number 3780
United States Marine Corps (USMC) Contract

Colt Model 1911 US Marine Corps Contract - .45 cal. S/N 3780, sold to the United States Government, shipped to Depot Quartermaster, United States Marine Corp, 1100 Broad Street, Philadelphia, PA on June 6, 1912 in a shipment of 300 pistols. 

This example has some replaced parts (slide is from a slightly later Model 1911, magazine release pin is a later type and hammer and grips [also mismatched] are from a M1911A1).  Barrel is original and is marked on the rear of the hood with a horizontal serif "H" and gun has key-hole magazine.  Gun has very little finish remaining and is being presented as-found.

Year Serial Number Range Shipment Qty
1912 3501-3800 Colt USMC 300
1913 36401-37650 Colt USMC 1250
1914 83901-84400 Colt USMC 500
1916 151187-151986 Colt USMC 800
1917 185801-186200 Colt USMC 400
1917 209587-210386 Colt USMC 800
1917 215387-216186 Colt USMC 800
1917 216587-216986 Colt USMC 400
1918 216987-217386 Colt USMC 400

Left side of 3780. 

Close-up of serial number.

Left side.  This example bears the ordnance mark W.G.P., for Major Walter G. Penfield, in the form of a monogram stamped on the left side of the frame above the magazine release.  Penfield inspected these pistols from January 2, 1911 - September 30, 1914.  Serial numbers of Model 1911 pistols inspected 1 - 101500.

Correct early style barrel with horizontal "H" with serifs.


Correct early style barrel with horizontal "H" with serifs.

Horizontal "H" with serifs on top of frame near disconnector.

Key-hole magazine.

Gun of the Month

January 2022

Contact Us


Home | Wants | Gun of the Month | Historical Info | Instruction Sheets
Site Search| Online Bookstore | Colt Care | Links

Questions / Comments? Contact Us!

The Rampant Horse and Colt logos are registered
trademarks of Colt's Manufacturing Company, Inc. Hartford, CT

Copyright 1996 - 2024 by All rights reserved.
Please read our online Privacy Statement
The logos and all proprietary artwork and photos are the property of and may not be reproduced or distributed without expressed written permission.