Very Rare Sea Hunt 'Good Luck' Coin

This is one of my most prized possessions. These 'good luck' coins were given to the various production staff, cast and crew of the Sea Hunt series as well as to fans, usually children, at Sea Hunt promotional appearances. Lloyd Bridges regularly appeared in schools, shopping malls, car dealerships, etc. to promote not only the enterprises that paid for his appearance but also his show.
The coin is like a medallion made from a light metal (probably aluminum) with an amazing likeness of Mike Nelson. People are amazed at the detail. You can actually see the individual bubbles of air coming out of Mike's regulator. Probably made in 1959. Extremely rare. I have seen pictures of this item elsewhere but never the real thing. If offered for auction it might sell for $150.