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
The records further indicate this conversion unit was returned to the
factory on November 17, 1938 and subsequently shipped to Zeppelin Arms
company in Akron, Ohio on December 1, 1938. They purchased the conversion
unit at the 1938 Camp Perry National Matches.
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.
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.