The Kowa Kallo W is a 35mm film camera produced by Kowa Optical of Japan. It sits within Kowa's mid-20th-century rangefinder line and was sold as a fixed-lens viewfinder camera for general photographic use.

Sales data for the Kallo W is very thin: a single UK auction hammer result from 2012 records a price of £150, so any sense of what one is worth today rests on that lone wholesale data point. With no recent comparables, sellers and buyers in the auction market should treat that figure as indicative only, and condition — particularly shutter function and lens clarity — will drive where a clean example sells for now.