| A late 19th Century minute recording chronograph with unusual dial in a gunmetal open face case. Gilt three quarter plate keyless movement with going barrel. Minute recording flyback chronograph above the plate. Plain cock with polished steel regulator, uncut bimetallic balance with
overcoil hairspring. Club foot lever escapement. White enamel dial with small chapter of Roman numerals in the middle for the time and standard seconds marking at the edge. Flyback centre seconds and 30 minute recording subsidiary. Graduated spiral scales for calculating speed in units per hour, marked in black, green, orange and blue. The first four minute segments of the minute record marked in similar colours to indicate which
section of the scale to use. Plain large slim gunmetal open face case with gilt hand set, hinge, thumb piece, winding button and bow.
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