Longines 13ZN Flyback Chronograph

About this reference

The Longines reference 5415 was produced during the 1940s and is no longer in production. Collectors prioritize this reference for its 37.5mm stainless steel step-bezel case and the inclusion of the caliber 13ZN, a manual-wind movement featuring an integrated flyback complication. The reference is noted for its waterproof-style case construction, often featuring round "mushroom" pushers and a screw-down case back. Dials typically feature multi-scale configurations, including tachymeter and telemeter tracks. Due to its rarity and technical significance, secondary market prices generally fall within the $60,000 to $120,000 range, though exceptional examples can exceed these figures. A notable auction result occurred in 2017 when a stainless steel 5415 with a silvered dial sold for approximately $140,000. Production numbers for this specific reference were limited, making well-preserved, unpolished steel examples difficult to source in the current vintage market.