Mens Omega from 1956, based on its serial number. This Omega will fit ladies aswell. Movement: 17 jewels mechanical manual winding movement with Cal. 420. Watch size: 33mm in diameter excluding the crown. 40mm from top lugs to bottom lugs. 15.7mm between lugs. Serialnumber/Productionnumber: 15713478 Reference number: 2830-6 SC 2829 Looks & Condition: This Omega is in overall good cosmetic condition with some remarks regarding scratches on the case and crystal. About the crown, i do not have any history about it. The crown may have been replaced on a service some long time before. The movement runs strong and keeps the time well. This watch will be shipped insured and tracked via Swedish Postservice: Postnord