The Hess & Sattler Detective is an early box-form detective camera, a category of concealed or plain-bodied plate cameras produced in the late 19th century. It was offered as a discreet stills camera at a time when photography outside the studio was becoming practical for amateurs.

Auction evidence for the Detective is thin: a single UK saleroom hammer result of £500 is on record (2016), so any current valuation in 2026 should be treated as indicative rather than a true market range. Condition, completeness of plate holders and original casework strongly influence what such a camera is worth today, and prices quoted here reflect wholesale auction levels rather than dealer retail.