LONGINES CHRONOGRAPH 13ZN MOBILE LUGS STEEL
Longines, movement No. 5405325, case No. 5405325.
Made in the 1930s.
Fine and rare, stainless steel « Staybrite », antimagnetic
wristwatch with square button chronograph, register,
tachometer and telemeter. Accompanied by a Longines extract
from the archives.
Three-body, solid, polished and brushed, stepped flat bezel,
large mobile lugs, snap-on case back, button at 2 for start/stop
and at 4 for return-to-zero of the chronograph.
Matte silver with painted black Arabic numerals, subsidiary
dials for the seconds and the 30-minute registers, outer 1/5th
seconds track, outer telemeter scale, inner spiral tachometer
scale. Blued steel Breguet hands.
Cal. 13ZN, 13''', rhodium plated, straight line lever escapement
with gold anchor, monometallic balance, selfcompensating
Breguet balance spring, index regulator.