1970s Longines Ultronic Chronograph. ・ ・ ・ This is our customer's Ultronic, I overhauled it. ・ ・ ・ #BulovaAccutron Licensed watch @AccutronDoctor... | By Accutron Doctor アキュトロンドクター | Facebook
Vintage Longines Ultronic Chronograph Cal. 749 – Elite HNW - High End Watches, Jewellery & Art Boutique
Longines "Ultronic" Cronografo, Mov. Diapason ESA 9210, metà anni '70 - YouTube