The Reid IIIa Military is a British-made 35mm rangefinder camera produced by Reid & Sigrist, a Leitz-derived screw-mount design built in the United Kingdom during the post-war period. The Military variant was finished and equipped to service specifications, and today it sits among the more collectable British rangefinders.

Auction data for the Reid IIIa Military is thin: a single UK auction hammer result in May 2025 saw an example sell for £1,300, which gives the only firm reference point for what the camera is worth at saleroom level today. Because hammer prices reflect wholesale levels achieved at auction (excluding commissions), retail asking prices from specialist dealers in 2026 typically sit higher, and condition, completeness of military markings, and matching original lens materially affect value.