How do I find my Omega reference number?

To find your Omega reference number, check the warranty card or the back of your watch's case. The reference number consists of 14 digits. The first three represent the collection, and the next two describe the housing and band materials. In the third set of digits, you'll find the diameter and height of the housing, and the following set of digits represents the type of movement. The penultimate number identifies the dial color, while the final digits tell you the production sequence number. On 1stDibs, explore a large selection of Omega watches.