RARE SEIKO STAINLESS STEEL 'SLIDE RULE CALCULATOR' CHRONOGRAPH WRISTWATCH ref. 6138-7000, c. 1970s, ser. 4****1, 21J Seiko 6138B automatic movement, black dial with quickset day-date (english/arabic), two subsidiary dials for 30 minute and 12 hour recording, central yellow chronograph hand, outer two-piece silde rule calibrated bezel, after market rubber dive strap, 44mm diam. Comments: chrono hand not setting back to 12, light scratches commensurate with age and general use.
RARE SEIKO STAINLESS STEEL 'SLIDE RULE CALCULATOR' CHRONOGRAPH WRISTWATCH ref. 6138-7000, c. 1970s, ser. 4****1, 21J Seiko 6138B automatic movement, black dial with quickset day-date (english/arabic), two subsidiary dials for 30 minute and 12 hour recording, central yellow chronograph hand, outer two-piece silde rule calibrated bezel, after market rubber dive strap, 44mm diam. Comments: chrono hand not setting back to 12, light scratches commensurate with age and general use.
.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
.jpg "Quelle: Christie's")
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.jpg "Quelle: Christie's")
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