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Up for sale is an iconic piece of watchmaking history: the Seiko Caliber 6138-0011, affectionally known by collectors as the "UFO" or "Yachtsman". Produced in the 1970s, this model is celebrated as one of the world's earliest dual-register automatic chronographs, offering both automatic winding and auxiliary hand-winding capabilities.This piece features its highly recognizable 44mm lugless, cushion-shaped stainless steel case. The deep black dial is accented by two vertically stacked sub-dials (a 12-hour register and a 30-minute register) highlighted with vibrant orange and red accents, paired with its original striking yellow chronograph sweep second hand.Model Ref: 6138-0011Movement: Seiko Caliber 6138B Automatic (21 Jewels)Complications: Chronograph, Quickset Day/Date (English/Roman numbers or Kanji depending on regional designation)Bezel: Fixed external Tachymeter bezel with red and silver sports trackingBracelet: Vintage stainless steel multi-link bracelet

Condition: (Never Polished or Repaired) Pre-owned vintage condition. The case showcases authentic age-appropriate wear with unpolished sharp edges. Dial and hands show beautiful original aging. Functions properly, and the chronograph crisply resets straight to vertical noon.