Brand Longines Reference number Longines Automatic Ultra-Chron 8317-5 Cal 431 Vintage 1973 Movement Automatic Case material Steel Bracelet material Steel Year of production 1973 Condition Good (Light signs of wear or scratches) Scope of delivery No original box, no original papers Gender Men's watch/Unisex Caliber Movement Automatic Caliber/movement Longines 431 Base caliber Longines 431 Power reserve 40 h Number of jewels 17 Frequency 36000 A/h Case Case material Steel Case diameter 36 mm Crystal Plexiglass Dial Grey Dial numerals No numerals Bracelet/strap Bracelet material Steel Bracelet color Steel Clasp Jewelry clasp Clasp material Steel Functions Date Other Description Here you have a superb Longines Automatic Ultra-Chron, reference 8317-5, running with the Longines automatic 431 caliber, Vintage piece, from 1973. Original Longines band, adjustable, fitting a wrist up to 20.5cm. The watch is in overall good condition, with a few signs of use throughout the watch, as you can see on the pictures. Only a few of them are available on the internet, and this piece is worth it's money. Do not miss the chance to have this very rare piece of horology, the more you wait, the rarest they will be. Pictures are part of the description, if you want to see more, do not hesitate to ask. Worldwide shipping with DHL Express / Colissimo.