Super rare and outstanding Diver Rotamatic, probably the earliest Rotary Diver ever seen. This watch is in a great condition and comes from 50s. Untouched dial, Radium Arabic numerals, broad arrow white hands and red second hand. The amazing fluted bezel and case bring it the "Longines Nautilus Brother" status. Original plexi glass in excellent condition. The original Tissuflex elastic shark mesh bracelet is wonderful and comfortable. AS 1580 movement, inside the Super-Waterproof 36 mm case engraved with the diver helmet in and outside the case back. Original signed crown.