The Spirotechnique Calypso is a 35mm underwater film camera, designed for use without an external housing. It was introduced in the late 1950s and was sold by the French diving-equipment company Spirotechnique before the design was later licensed to Nikon.

At UK auction, hammer prices for the Calypso are thinly traded, with the two recorded sales fetching £350 and £700 — a wide spread that reflects how much condition and completeness drive what this camera is worth today. With so few data points, any single figure should be treated as indicative rather than a firm market price in 2026.