Vintage 50's Gruen Cal.510 ss Manual Wind Men's Watch Manufacturer: Gruen Circa: 1950's Case: 33mm, not including the crown, 42mm lug to lug, 18mm lugs Case: Plated bezel, good shape. Stainless back Dial: Looks good for age. Movement Type: Gruen Cal.510 SS wind up, runs well and keeps time Crystal: Good condition Crown: unsigned Band: Old stock Faux leather watch band trap. Made in England