This is the Steel Helium Escape Valve HE for the later model Seamaster Planet Ocean Chronograph.
086stz005500
These are Omega supplied service HE valves for the c.9900 automatic movement.
This was fitted to the model reference 215.30.46.51.01.001
086stz005500 Omega Planet Ocean Chronograph 45.5mm Helium Escape Valve c.9900
SKU: 086stz005500
£199.99Price
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.