Longines. A stainless steel openface keyless split second chronograph pocketwatch
Signed Longines, No. 7411 1, movement No. 12303218, 1970s
The nickel plated bar movement jewelled to the centre, the fast oscillating bimetallic balance with micrometer regulation and start/stop device operated by a thumbpiece in the band, the brushed silvered dial with Arabic numerals, subsidiary dials for running seconds and 30 minute counter, grey outer seconds ring with two sweep centre second hands, the upper one with Vernier scale attached, both operated by the button and the winder, in circular openface case with screw down back and snap on cuvette, the winder fitted with a lock to prevent accidental operation of the chronograph, case, dial and movement signed and numbered
67 mm. diam.