Energize a mechanical watch with the proper mainspring, available from Cas-Ker Co. You'll find an extensive selection of mainsprings for pocket watches and wrist watches at Cas-Ker. Additional mainsprings may be in stock in our warehouse, not listed on our website at this time - call us if you don't see what you need here.

Cas-Ker Co.
2550 Civic Center Drive | Cincinnati, OH 45231 | CALL 800-487-0408 | FAX 800-487-5848 | Cincinnati 513-674-7700