LEGEND OF TIME - CHICAGO WATCH CENTER

Vintage Rare Heuer Watch 1980 Lemania 5100 Pewter 510-503

1980's Excellent condition very hard to find in vintage watches, no deep nicks, very rare and collectable.

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The 5100 is a particularly rugged but accurate calibre used mostly in military and space applications. The 5100 was the only calibre that met their military requirements. Among the brands who supplied Calibre 5100 military chronographs under contract were Sinn, Fortis, Hamilton, Orfina, and Tutima.

SHOCK RESITANCE: Due to its construction, Calibre 5100 was the only chronograph movement that can withstand large shocks without its chronograph seconds hand stopping. This is because its chronograph mechanism is driven directly unlike most other chronographs which use an intermediate wheel. The calibre easily withstands acceleration in excess of 7G without appreciable loss of accurary. The calibre also maintains its accuracy over long periods without servicing. Service intervals from four to seven years have shown to be sufficient.

The dial on the 5100 has a central chronograph elapsed minutes counter that is easier to read at a glance unlike chronographs which register elapsed minutes on a subdial.

There is also 24-hour (military time) indicator at the 12 o’clock position.

Because of the central chronograph minutes hand, the 5100 dial is extrememy legible, and in effect provides a large 60-minute elapsed minutes register instead of the usual 30-minute subdial elapsed minutes register. Along with the movement's exceptional shock resistance, its legibility was what made these watches particulary useful for military conditions.