ADIGA wrote:
That plastic part is a seal to the antenna if it's off then Breitling would insist on a full service. However, it is always a full service with the emergency.
It is made of hard plastic and not really there to seal the antenna cap; it covers the orange color that when visible is an indication that either the antenna cap is loose or that the antenna might have been deployed. They do get brittle with age, catch on things and break off. the problem is that you can't even get to that little ring without removing the entenna from the case...if it really bugs you, find a suitable o-ring and slide it over the cap. At least you won't see the orange where the grey ring is supposed to go...