Tissot PRX UFO Robot Grendizer 50th AnniversaryvsYema YEMA x Alain Silberstein Limited Edition

The Tissot PRX UFO Robot Grendizer 50th Anniversary is praised for its tasteful integration of anime elements onto the PRX design, featuring an engraved Grendizer bust on a sunburst blue dial with Super-Luminova, and is the first 40mm PRX to omit the date. Owners widely report huge demand, with all 1975 units selling out quickly. The packaging and watch box are described as "dope" and "insane," with one commenter stating the packing alone is "worth the buy." The watch retains the familiar 40mm case, Powermatic 80 movement with 80-hour power reserve, and integrated bracelet. Some find the Grendizer dial less appealing than the standard waffle dial, with one owner calling it "childish," while another considers it "the best PRX." The Grendizer graphic is less prominent in person than in photos, and the watch has a ghost date position. The Tissot PRX UFO Robot Grendizer 50th Anniversary retails for US$825 / CHF 795.

The YEMA x Alain Silberstein Limited Edition is noted for its avant-garde, playful design featuring toy-like hands and a vibrant dial, housed in a 40mm black DLC-coated titanium case. It is powered by the French CMM.20 micro-rotor automatic movement, offering a 70-hour power reserve and rated accuracy of -3/+7 seconds per day. Some reviewers and owners find the sea star and koi motifs on the handset and caseback discordant with the overall aesthetic, and the polished Yema logo and "Marine" label on the dial are considered incongruous with the matte case. The $3,900 price is frequently cited as a significant negative. Overall, opinions on the YEMA x Alain Silberstein Limited Edition are sharply divided, with the price and design elements being the most contentious points.