Seiko Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited EditionvsUndone Sport Speedy

The Seiko Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition is praised for its retro design and good finishing within a balanced 42mm case. Reviewers note a 100m water resistance and sapphire crystal. One review flags the 45-hour power reserve as short compared to modern Swiss competitors, and the date window at 4:30 is a point of debate. Another review suggests a desire for a thinner case, quick-release strap mechanisms, and micro-adjustment on the bracelet, while also perceiving the watch as costly. On balance, reviewers appreciate the vintage-inspired design and finishing but note trade-offs in power reserve and bracelet features, with some finding the price point high.

Owners praise the Undone Sport Speedy's vintage chronograph aesthetic and the accuracy of its meca-quartz movement. Reviewers highlight the extensive customization options and value at $315. One owner finds the leather strap stiff and the display case back on a quartz watch unnecessary. Another reviewer notes the meca-quartz VK64 movement's pusher feel and hand reset are mechanical-like, though the movement itself is undecorated. On balance, owners and reviewers rate the Undone Sport Speedy highly for its vintage styling and customization potential at its price point.