Nivada Grenchen Chronomaster Aviator Sea Diver 85006

The Ref. 85006 represents the Chronomaster’s bold evolution into the 1970s. The most significant change from prior models is the move away from the classic straight-lug case to a larger, more robust tonneau or “C-case” shape, increasing the case width to 39mm. This design update gave the watch a heavier, more contemporary presence on the wrist, perfectly aligning with the era’s trends. Housed inside this new case shape was the reliable Valjoux 7733 manual-wind movement. While standard black dial versions exist, the Ref. 85006 is most famous for its vibrant “exotic” dial variations. These dials, sometimes nicknamed “Paul Newman” by collectors, feature contrasting white or silver sub-dials against a black background, along with colorful orange or red accents on the chronograph hands and dial markers. This reference is a quintessential example of 1970s watch design, combining a workhorse movement with a bold case shape and daring use of color, making the exotic dial versions particularly sought after by collectors today.