Seth Thomas Mainspring 18 Size, #729
Seth Thomas White Alloy Watch Mainspring
- SKU MS-JA653
- Size 18
- Factory No. 729
- Width 24
- Dennison Strength 2
- Length 30"
- Metric Width 3.30
- Metric Strength 0.22
- End T-BRACE TB End
This item is typically IN STOCK and ready to ship.
Most orders are shipped from our facility within 24 hours, Monday through Friday.
See Shipping Info link at bottom of page for more details.