The Riken Optical Hanken is a Japanese camera produced by Riken Optical, the company that later traded as Ricoh. It is an older film-era model that surfaces only occasionally on the collector market.

Public sales data for the Hanken is extremely thin: a single UK auction hammer result from November 2019 recorded a price of £2,600, which sits well above typical mid-century Japanese compact values and points to scarcity rather than a stable market. With only one data point at saleroom level (wholesale, not retail), it is not possible to quote a meaningful range or median in 2026, and the price any given example sells for today will depend heavily on condition, completeness and bidder interest on the day.