The Kowa Kallo T 100 is a Japanese 35mm fixed-lens camera produced by Kowa Optical. It belongs to the Kallo series of mid-century rangefinder-style cameras and was sold as a consumer 35mm model.

UK auction data for the Kallo T 100 is extremely thin: a single recorded hammer result at saleroom level reached £480 (2003). With only one data point, today's market value is difficult to pin down, and any current price would depend heavily on cosmetic condition, working shutter, and clean optics — buyers should treat the figure as historical rather than a current guide to what one sells for.