My Grandfather was a welder at Portsmouth Naval Shipyard, (PSNY)on the Piscataqua River between Maine and NH during the war. Each man that contributed to building the submarine was presented a builders tag, at the boats commissioning. Here is a picture of his builders tags, and a snapshot of the shipyards production records from the book "Portsmouth Built". As you can see he had a hand in building the USS Batfish. We owe such a debt to ALL that carried the USA, through to victory during those times.