Panerai Navy Seals Experience 1 Challenge Coin. Coin is approximately 2 inches in diameter. At the end of the experience the participants were awarded a coin. If you are a Panerai Seal Team watch owner or Panerai collector this is a great opportunity to obtain a very unique coin. Coin is laser engraved on the side: Panerai Navy Seals Xperience 1. General Information & Frequently Asked Questions – Please read before you message me. I will not respond to any questions regarding this policy. For any questions not covered above.