HEUER Military Flyback Chronograph Bundeswehr 'Sternzeit Reguliert' Ref. 1551 SG SZ
Military Serial # 6645-12-148-2298
Circa: Late 1960’s
Serial: 4718
Reference No.: 1551 SG SZ

Movement: Valjoux 230, Hand-wound mechanical flyback column-wheel chronograph movement, 36h power reserve, 17 jewels, Incabloc-shock resistant, anti-magnetic

Dial: Black Dial with Heuer logo, Sternzeit Reguliert and small T over the 6, luminous deco numerals, subsidiary seconds at 9 o’clock and 30 minute chrono counter at 3 o’clock

Case: 43mm, large sized steel with sandblast finish with black PVD coated aluminum bi-directional 60-min bezel, Glass in acrylic
Caseback engraved with NATO code 6645-12-148-2298 plus engraving due to it’s military use.

Strap: Leather bund strap

Condition Report: very good condition

NOTES: Bundes Wehr means ‘Federal Defence’ in German. This military flyback chronograph, introduced by Heuer in 1968, is an iconic vintage wristwatch associated with the German military. This watch has the word “Bundeswehr” followed by the military serial number, The Sternzeit Reguliert version was used by artillery corps and used charts to calculate sidereal time.
Since this is a flyback chronograph, the mechanism can be reset while it is still running, making it particularly useful for servicemen timing consecutive short interval events. The beauty in this mechanism is when the reset button is pressed, the flyback lever lifts the coupling clutch from the chronograph center wheel allowing the mechanism to reset.