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Old 07-03-17, 12:49 AM   #4
Sniper297
The Old Man
 
Join Date: Dec 2005
Location: Philadelphia Shipyard Brig
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I stand corrected. Most Porpoise class were welded, but the four built at Portsmouth, including the Pollack, were indeed riveted. The rest were built at Mare Island or Electric Boat, those were all welded.
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