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July 2009

Early Pre-War .22 LR Service Model
Conversion Unit - SN U29

Collector's Information

Disassembly Instructions

Parts Identification

Production Information

Conversion Unit .22-.45 Instruction Sheet PDF (457k)
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R. DiFlorio Collection
Early Pre-WWII (ca. 1938) Numbered Conversion Unit serial number U 29 complete with original numbered box and all accessories.  Two tone magazine with "Service Model" designation on the floorplate.

Factory records indicates that the unit was charged to Colt's Loan Account and shipped to the National Matches, Camp Perry, Ohio on August 11, 1938.  (Also see U 21 which was in this same Camp Perry shipment of 10 units.) This was processed on Colt Factory Number 8045 and was one of 10 units in shipment. 

Top view of rear sight and numbered slide.

Photos of conversion unit box showing internal and external labels.

 
Right side of slide.

Detail of left side slide markings.

Sights

Parts - note how barrel and floating chamber are numbered to match the serial number on the top of the unit.

Service Model Ace two-tone magazine.

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