Bonhams 1793 : Longines. A rare stainless steel military style chronograph wristwatchRef: 30, Case no. 23432, Movement no. 7222748, 1940's

Ref: 30, Case no. 23432, Movement no. 7222748, 1940's
Cal. 13ZN two button chronograph movement with monometallic balance, overcoiled spring, index regulator, matte silvered dial with fifth seconds ring enclosing arabic numerals, subsidiary dials for continuous seconds and 30-minute register, snap back case with molded bezel, round chronograph buttons in the band, down turned lugs, leather strap with steel Longines buckle, case, dial and movement signed. 37mm

Sold for US$ 4,375 inc. premium

Footnotes

The Longines 13ZN chronograph movement is considered by many as one of the most beautiful and reliable integrated chronograph movement ever made. Introduced in 1936, the 13ZN was the first chronograph movement with semi instantaneous counters, This allowed the subdial counters to immediately and instantaneously indicate the chronograph's exact timing. This reliable and precise movement introduced before the Second World War was rapidly put to Military use.

Longines created many versions of large wristwatches during this period including models with a monopusher or classic two pusher combination. After the Second World War, the caliber was replaced by the Longines 30CH mostly due to its high cost of production. Today watches fitted with the 13ZN are collectors' cult favorites.