I think this has been handmade by one of the sailors originally on the Queenfish....doesn't look like an Official US NAVY Plaque. Measures 10" x 8 1/4". The SSN Queenfish was launched in February 1966 and was a Sturgeon Class Attack Submarine and the first single screw sub specifically designed for under ice operations.
At Molloy's MEGA ANTIQUES CENTRE, Takapuna, Auckland, New Zealand
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