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




Colt Conversion Unit .22 LR-.45 ACP - Early Pre-War Service Model Conversion Unit in Original Box - SN U229 (ca. 1938)

Early Pre-WWII (ca. 1938) Numbered Conversion Unit complete with original box, instructions and all accessories.  Two tone magazine with "Service Model" designation on the floorplate.  Box is earliest type that lacks center compartment for recoil spring.

This unit was one of three shipped to Von Lengerke & Antoine, Chicago, Illinois on September 2, 1938.

View of rear sight, numbered slide and two-tone conversion unit magazine.

"U" prefix number on the top of the slide just ahead of the rear sight. 

Detail of the early style Stevens adjustable rear sight.

All component parts of the disassembled conversion unit showing right side of slide.

Barrel and floating chamber are numbered U229 which is the number on the top of the slide.  Ejector is the early milled type.

Detail of right side slide markings.

All component parts of the disassembled conversion unit showing left side of slide.

Detail of left side slide markings.

End of box showing top and bottom label.  Also attached is the original V.L.& A., Chicago tag from retailer Von Lengerke & Antoine in Chicago.

Empty early style box.  Notice the lack of a compartment for the recoil spring as is found in later boxes.

Top label.

Conversion unit box, assembled conversion unit, magazine, slide stop, recoil spring & guide, original yellow hang tag (which contains operating instructions for the Stevens sight) and factory instruction sheet.  Opposite side of yellow sight hang tag contains a diagram illustrating how to adjust the sight.

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.