Automatic Seiko SRP-275J1, Caliber 4r36, hardly crystal, case diameter 40mm without crown, 43 including crown, thickness 11mm, lug to lug 46mm, it's in excellent condition, pictures don't do it justice, never been worn on the original strap, i've worn it about 5 times & I've had it since 2013. If you have never had an automatic watch, this is a great introduction to them, it's got hand winding as well as winding from the movement from your wrist. Box & all papers included.