The bail opening is approx. 1.5mm wide.  The bezel is 14K gold while the coin is a real shipwreck coin.  It appears to be a pieces of 8 Spanish coin.

The gold is fully hallmarked, has been fully tested, and verified. The pendant weighs in at 16.2 grams. There are no problems. This item is pre-owned and there will be ordinary and normal use marks. Comes from a clean, smoke-free home.