Ithaca M1911A1 Known Correct Features

This page provides original collector guidance for evaluating Ithaca WWII M1911A1 pistols. Ithaca pistols should be reviewed using serial range, markings, finish, parts, and inspection clues together.

Ithaca Collector Checklist

Area	What To Review
Inspector	F.J.A. inspection initials are one of the most important Ithaca identification clues.
Slide	Compare Ithaca slide markings and style to WWII contractor examples.
Frame	Review frame markings, ordnance stamp, and finish consistency.
Finish	Evaluate finish condition and consistency across the pistol.
Small Parts	Check mainspring housing, grips, hammer, trigger, and controls for period consistency.
Barrel	Document barrel markings carefully because replacement barrels are common on service pistols.
Service Marks	Check for arsenal or depot markings such as AA, SA, or RIA.

Important Duplicate Serial Range

Important Ithaca Warning: Serial numbers 856405 through 916404 overlap with Colt production. A pistol in this range should be identified using physical features and markings, not serial number alone.

Feature	Ithaca Review	Colt Comparison
Inspector	Look for F.J.A. inspection initials.	Colt inspection marks should fit the Colt production period instead.
Slide	Ithaca contractor markings and style.	Colt markings and address lines differ.
Frame	Frame markings should fit Ithaca contractor production.	Colt frame markings should fit Colt production.
Finish	Evaluate against Ithaca wartime production or service history.	Compare against Colt wartime finish expectations.

Common Ithaca Review Points

Duplicate-range serials should be checked against F.J.A. and maker markings.
Slide markings should be consistent with Ithaca production.
Finish and markings should be reviewed together.
Mixed service parts should be described accurately.
Modern replacement parts should be documented when present.