25th Anniversary Challenge Coin

Our 25th Anniversary Challenge Coin. This is a limited production collectible challenge coin produced for and sold only by the Historical Diving Society USA. Check out our series of coins that will highlight different diving helmets with a positive impact on deep sea diving.

These collectible coins are 1.75″ in diameter, are highly detailed, and will be a prized possession for years to come. Each comes in a soft PVC envelope.

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