This is the Steel Case Back which fits the Seamaster vintage 300M watches 165.024 166.024.
These are Omega supplied service case backs which fit the Seamaster 300M case reference 166.0324, Omega product code 055ST1660324, this is the service case for the old vintage models which are no longer available.
Omega Seamaster 300M 166.0324 Case Back Watch 165.024 166.024
Items can only be returned if either faulty, in the case of the item not being required then it must be returned exactly as received. For example if the item is new in a sealed packet and/or has protective covers in place then it must be returned the same otherwise item is no longer new and the value is greatly reduced, these items can only be returned/refunded by agreeing a lower value with Swiss Limited Editions before returning reflecting the new lower value of the item.