Rado

This is a distinctive and highly collectible vintage Swiss sports watch from Rado's legendary scratch-resistant DiaStar line. As clearly shown from a profile perspective in image_26.png, the watch features a chunky, avant-garde square-tonneau case made from Rado's signature ultra-hard tungsten carbide alloy, showcasing a high-polish, mirror-like finish on its broad bezel. The deep blue dial stands out beautifully, offering an organic texture that resembles an authentic lapis lazuli stone or stardust finish. It features chunky, multi-faceted silver index markers, a white outer minute track, and silver baton hands. The signature moving Rado anchor logo is positioned under 12 o'clock, with "RADO" at 9 o'clock, "DIASTAR / 515" at 3 o'clock, and a framed date window at the 3 o'clock position displaying a contrasting red numeral. The base of the dial is signed "T SWISS MADE T". The reverse architecture is highlighted in image_27.png, revealing a square stainless steel caseback secured by four corner screws. It proudly retains its original protective gold-toned factory sticker, which reads "BREV. + OET. ET R. DEM.", "DIASTAR", "WATER SEALED", and "515" alongside Rado's iconic twin-seahorse emblem. The integrated brushed stainless steel bracelet terminates in a folding clasp deeply stamped with the "RADO" brand name and anchor logo.