BREITLING PREMIER DUOGRAPH Reference: AB1510. Serial number: 4606573. Steel case. Navy blue dial, featuring two sub-dials (seconds, minute totaliser), with Arabic numeral hour markers. Hand-wound mechanical movement (calibre B15). Leather strap with signed folding clasp. Sapphire crystal. Circa 2022. Diameter: 42 mm. Supplied with its original case and papers. A stainless steel mechanical chronograph movement by Breitling. Circa 2022. RC: Sold as is, with signs of wear and use. Movement was in working order at the time of writing this description; a routine service is recommended; no warranty.