: Rare Vintage Citizen Automatic Chronograph - Cal. 8100A - Flyback - Black PVD Case ​Description: Up for sale is a stunning and rare Citizen 8100A Automatic Chronograph from the 1970s. This model is highly sought after by collectors due to its "Walter Wolf" style black case and advanced technical features. ​Movement: Citizen Caliber 8100A high-beat (28,800 bph) automatic movement with Flyback function. The flyback feature allows you to reset the chronograph without stopping it first. ​Case: Original black coated sports case. Shows some authentic vintage wear on the edges, giving it a great character and "tool watch" aesthetic. ​Dial & Hands: Beautiful black dial in excellent condition. Day/Date display at 3 o'clock. ​Condition: The watch is in great working order. The chronograph starts, stops, and resets perfectly to zero. Genuine movement and case back photos are included. ​Strap: Paired with a high-quality, handmade black leather strap with contrast beige stitching. ​This is a fantastic opportunity to own a piece of Japanese watchmaking history. Perfect for vintage chronograph enthusiasts.