Part Number: 12LBS (Balance spring)Part Number: 150CRM (Balance spring)Part Number: 27FR33033 (Balance spring)Part Number: 5404500 (Balance spring)Part Number: 667099E12 (Balance spring)Part Number: BALANCE025KIL0S (Balance spring)Part Number: GD322-3901-5 (Balance spring)Part Number: GD322-3901-7 (Balance spring)