Hamilton Khaki Navy Scuba QuartzvsSeiko Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition

The Hamilton Khaki Navy Scuba Quartz is noted for its 37mm case size, matte green dial, and aluminum bezel insert, offering 100m water resistance and a green NATO strap. It is powered by an ETA F06.105 quartz movement with an extended battery life of up to 94 months, and is priced at $545. One owner questions its value proposition based on significant price differences between regions. On balance, the Hamilton Khaki Navy Scuba Quartz is seen as a functional quartz dive watch with a notable battery life, though its value is debated by some owners.

The Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition is praised for its retro design, balanced 42mm case, good finishing, and sapphire crystal. It is powered by the calibre 8R48, featuring a column wheel and vertical clutch, and offers 100m water resistance. Some find its 45-hour power reserve short compared to modern alternatives, and the date window placement is a point of discussion. The solar-powered variant is noted for its compact proportions and character, though some desire thinner cases and improved bracelet micro-adjustment. Overall, owners and reviewers appreciate the SPEEDTIMER's vintage-inspired aesthetics and solid build, with critiques focusing on power reserve and minor functional details.