Title Seiko “Momotaro” Pendant Watch 21-7510 – 17 Jewels, Manual Wind, Octagonal Lacquer Case (Japan, 1971) Description A rare Seiko pendant/pocket watch set nicknamed “Momotaro,” combining a mechanical watch head with a sculptural, hinged octagonal case in deep red-black lacquer style and gilt floral motifs. The braided red tassel allows it to be worn as a pendant or displayed like a miniature desk clock when opened. Brand: Seiko Model/Ref.: 21-7510 (engraved on case back) Serial: 120860 (visible on case back) Movement: Mechanical, manual wind, 17 jewels (printed on dial) Dial: Silver sunburst with Roman numerals at XII, III, VI, IX; baton minute markers; “SEIKO” logo; “17 JEWELS” & “JAPAN” at 6 o’clock Watch head case: Octagonal, chrome-plated; crown at 12 o’clock when displayed; faceted mineral/plastic crystal Outer holder: Two-piece octagonal hinged shell, red/black lacquer-style finish with gilt floral inlay; metal spine and opening button; braided red cord with tassel Markings (back): “SEIKO / 120860 / CRP BACK ST. STEEL / 21-7510” (see photos) Production year (explained) Seiko serial numbers typically use the 1st digit = year of decade, 2nd digit = month. Serial 120860 therefore indicates February ‘1. Given the mechanical pendant style and model family era, this example is most consistent with February 1971. Condition (working) Currently running (tested at listing). Case and shell show age-appropriate wear: fine scratches, small nicks at edges/hinges, light spotting on metal; minor marks on crystal. Please review all photos for the best assessment of condition. Size Watch head width (excluding crown): [27mm] Lug-to-lug / height across flats: [30mm] Thickness: [8mm] Outer shell (closed) approx.: [37W ×39 H × T 10mm] What makes it special This “Momotaro” presentation pairs Japanese decorative craft styling with a true mechanical Seiko 17-jewel movement. Worn as a pendant or stood open as a miniature table clock, it is a conversation piece for Seiko and design collectors alike—far less common than standard pocket watches or wristwatches from the same era. Included Seiko watch head 21-7510 installed in the hinged lacquer-style shell Braided red cord with tassel Shipping, taxes & notes Safely packed and shipped by DHL or Japan Post (estimated delivery time 1–2 weeks). Import duties, taxes and charges are not included and are the buyer’s responsibility. Please inspect all photos carefully before bidding/purchase. We strive to represent items accurately, but colors may vary slightly due to monitor differences. Thank you for your bid. Seiko, Momotaro, pendant, pocketwatch, manual, mechanical, vintage, Japan, 17jewels, octagonal, lacquer, Roman, tassel, collectible, retro, 1971