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GRUEN PRECISION DAY-NITE, Circa 1960s


Chromeplated Case with Stainless Steel Back. Silver Original Dial. 17 Jewel Manual Wind. Cal. 510ca RSS.
Silver Luminous Hands. Cutouts to Show Black Markers from 6:00 AM to 6:00 PM;
Green Luminous Markers from 6:00 PM to 6:00 AM. Original Unsigned Crown. Plastic Crystal. 34mm Case.
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