Seiko Ersatzteil 565901 – Sekunden-Herzschnecke für Stoppuhr Kaliber 9011 – NOS GMT · Design & workmanship: Top

·       Design & workmanship: Top class

3 mm (ohne Krone) Höhe: 13 mm Lug-to-Lug: 47 mm

gently rounded edges due to the firing process – Hands: blued (dark blue) for maximum readability and classic contrast

Im November 2025 komplett revidiert

Seiko Ersatzteil 565901 – Sekunden-Herzschnecke für Stoppuhr Kaliber 9011 – NOS GMT · Design & workmanship: TopOriginal Seiko spare part 565901 , classified as S part 687 , from unused old stock (NOS). This is the Heart Cam (seconds heart cam) for the Seiko 9011 stopwatch . This component is central to the reset mechanism of mechanical stopwatches and ensures that the second hand jumps exactly to zero when reset. This part comes from long term storage, is unused, and in excellent original condition. Due to the rarity of mechanical Seiko stopwatch parts, this