Weiss Watch Company CAL 1003 Ultralight

CAL 1003 Ultralight is a manual-winding movement manufactured by Weiss Watch Company in Los Angeles. It evolves the base CAL 1003 by replacing traditional brass plates with black anodized 7075 aluminum, an aerospace-grade alloy also used in aircraft wings and fuselages. The movement operates at 3Hz with a 46-hour power reserve, and polished screws and jewels create visual contrast against the dark aluminum plates. Used in the American Issue Field Watch Ultralight Limited Edition paired with a Grade 5 titanium case, the construction prioritizes minimal weight while maintaining the movement's proven architecture. The movement remains in production.