Sinn 6012vsMarathon Steel Navigator SSNAV-D Auto

The Sinn 6012 is a handsome, complicated chronograph featuring five dial-side complications, including a moon phase, built on a modified ETA 7751 movement. Reviewers note its clean dial offers good legibility, though one wished for a red accent on the date pointer. One long-time enthusiast considers the Frankfurt series, including the 6012, to be overpriced. The 14.5mm thickness makes it a slightly tall dress option. Overall, owners and reviewers find the Sinn 6012 to be a well-executed, complicated chronograph, with the primary reservation being its perceived value.

The Marathon Steel Navigator SSNAV-D Auto is praised for its durable construction, featuring a sandblasted steel case with improved lugs, a bi-directional bezel with excellent action, and 100m water resistance. Owners appreciate the constant visibility provided by self-illuminating tritium gas tubes and the precision of its ETA F06.412 quartz movement, which offers accuracy to about 10 seconds per year. The watch includes a GMT bezel for dual timekeeping and a synthetic sapphire crystal. Overall, owners and reviewers rate the Marathon Steel Navigator SSNAV-D Auto highly for its robust tool-watch design and reliable tritium illumination.