The Riken Optical Hanken is a Japanese camera produced by Riken Optical, the firm later known for the Ricoh brand. Detailed specification data for this specific model is not provided here, so categorisation beyond the manufacturer is omitted.

Public UK auction data for the Hanken is extremely thin: a single recorded hammer result from June 2008 sold for £1,900, which sets the only reference point available for what one has been worth at saleroom level. With just one data point, it is not possible to give a reliable current price range or median for what a Hanken sells for today, and any value should be treated as indicative rather than a market rate.