Certina DS-7 Chrono AutovsHamilton Jazzmaster Auto Chrono

Owners and reviewers widely praise the Certina DS-7 Chrono Auto for its retro 1970s-inspired design, featuring a waffle-style dial with raised sub-dial rings and a contrasting red seconds hand, all housed in a refined 42mm brushed steel case. The watch is noted for its excellent finishing and sporty aesthetic, with some owners remarking that it wears smaller than its 42mm case size due to its thinness for an automatic. The integrated bracelet is generally well-received, though one reviewer found the included strap to be cheap, uncomfortable, and an impractical 21mm width. The automatic movement is cited as a robust Valjoux A05.231 with a 68-hour power reserve, and the watch is considered a great value. One owner notes the movement beats at 21,600 bph, resulting in a more noticeable tick rather than a smooth sweep. On balance, owners and reviewers rate the Certina DS-7 Chrono Auto highly for its attractive retro design and excellent value proposition.

Owners widely praise the Hamilton Jazzmaster Auto Chrono for its excellent value and substantial, dressy appearance, with many noting its superior quality and finish compared to other brands. The H-21 movement offers a 60-hour power reserve, though its thickness makes the watch unsuitable for those seeking a slim profile. Some owners express a preference for a 3-6-9 subdial layout or a smaller case size. On balance, owners rate the Hamilton Jazzmaster Auto Chrono highly for its strong value proposition and appealing aesthetic.