At CALX, we specialize in high-quality custom watches that utilize NH movements from Time Module Inc. (TMI), a subsidiary of Seiko Instruments Inc. (SII).

We are not affiliated with any of the brands shown; all of these are aftermarket parts, such as Seiko TMI NH movements and various non-OEM or OEM suppliers' parts to create custom modified timepieces. "Custom" and "Made to Order" means that the piece is made to order and is not from the Seiko factory nor related to Seiko.

Please note that you are purchasing a customized Seiko watch.

By definition, this is a Seiko movement with the addition of custom or aftermarket parts. Customizations can include case, hand, bezel, artwork, and designs. These modifications are common within the luxury watch industry, particularly with Seiko watches. It should be noted that under certain circumstances, Seiko may reject servicing or repair of modified watches without their express authorization. We are not responsible for any delays.