LONGINES 13ZN CON RITORNO IN VOLO REF. 3756 IN ORO, 1941 CIRCA

LONGINES OVERSIZE 13ZN FLYBACK REF. 3756 IN GOLD, CIRCA 1941
RARE AND HIGHLY COVETED OVERSIZE AND "ANTI-MAGNETIQUE" CHRONOGRAPH WITH FLYBACK FUNCTION
Case: signed, n. 6152282, three-body, 18K gold, snap on caseback, rectangular pushers, dommed winding crown.
Bracelet/Strap: not original.
Dial: signed, silvered, stamped bâton indexes and Arabic numerals, minute track and 1/5th of seconds fraction, subsidiary dials for seconds and 30-min register, red telemetric and blue tachymeter graduations, leaf hands.
Movement: signed, manual-winding cal. 13ZN, n. 6152282, gilded, column wheel system, monometallic balance with screws, blued Breguet hairspring, Shock-resist absorber.
Accessories: Longines Extract from the Archives confirming the invoicing to Ostersetzer, agent for Italy.
Diameter Ø: 37 mm
Note: working.

The 13ZN caliber with fly-back function was introduced by Longines in 1936 with the intention of permitting the seconds chronograph hand to be resetted to zero even while the chronograph is running. The present exemplar shows some of the features most sought after by Longines collectors, in addition to an excellent state of conservation.