LONGINES REF. 6552 30CH STEEL
Longines, movement No. 50117106, Ref. 6552-3.
Sold on May 14th, 1969.
Very fine and rare, stainless steel wristwatch with square
button fly-back chronograph, instantaneous 30-minute register
and tachometer. Accompanied by a Longines extract from the
Three-body, polished and brushed, inclined bezel, concave
lugs, snap-on case back.
Steel with arabic indexes, subsidiary dials for the seconds
and the 30-minute register, outer tachometer scale and 1/5th
seconds track with 5-minute/seconds Arabic markers. Steel
Cal. 30 CH, rhodium-plated, 18 jewels, straight-line lever
escapement, monometallic balance, self compensating blued
steel Breguet balance spring, shock absorber, index regulator.