The Bloch Physio-Pocket is a late 19th-century detective-style pocket camera, designed to be carried discreetly for candid photography on dry plates. It predates roll-film hand cameras and is of interest primarily to collectors of early photographic apparatus rather than users.

Auction evidence for the Physio-Pocket is thin, but the two UK hammer results on record sit between £450 and £1,100 at saleroom level, with a midpoint around £780 (hammer, excluding commission). As of 2026 the small sample size means any single example's price is highly dependent on completeness, cosmetic condition and whether original accessories are present, so what one sells for can vary sharply from the headline range.