Calibre OP III 21 jewels the two-tone satined silvery dial with black Arabic numerals and hour markers outer luminescent indices engine-turned subdial for small seconds aperture for the date in four-part case mirror-finished hinged cover engraved with peonies and foliage on a gilt background engraved keyfret border sapphire crystal with magnified lens screw back trademark crown protecting bridge with lock lever stainless steel Panerai buckle case dial and movement signed.