New Old Stock vintage Omega armoured crystal Ref:PZ5241.Crystal is 100% genuine with omega hallmark in center.Fits Omega 1660174.Diameter is 31.60mm and comes complete with stainless steel tension ring.Feel free to ask any questions and buyer please send email or phone number to send item by registered mail and leave feedback when item is delivered.Delivery outside EU is subject to customs will not be responsible for any delays or taxes.