OtherUS Submarine Development Squadron Twelve

Cachets should be listed in chronological order based on earliest known usage. Use the postmark date or best guess. This applies to add-on cachets as well.

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SUBMARINE DEVELOPMENT SQUADRON 12 - Naval Submarine Base New London, Groton, CT

 

Thumbnail Link To Cachet Close-Up Image	Thumbnail Link To Full Cover Front Image	Thumbnail Link To Postmark or Back Image	Postmark Date Postmark Type Killer Bar Text Ship --------- Category

 

N/A		N/A	Commissioned Submarine Development Group 2 - 9 May 1949 Redesignated Submarine Development Squadron 12 - 1 May 1977
			DEVRON12 Crest

"Submarine Development Squadron 12's mission, as assigned by the Chief of Naval Operations, is to develop the tactics and promulgate the tactical doctrine to conduct submarine warfare."

 

N/A		N/A	1965-01-13 USPO Slogan Machine Cancel "Submarine Base Sta." Groton CT
			USS Cavalla AGSS-244

Cacheted

 

N/A		N/A	1965-01-12 USPO Slogan Machine Cancel "Submarine Base Sta." Groton CT
			USS Dace SSN-607

Cacheted

 

N/A		N/A	1965-01-11 USPO Slogan Machine Cancel "Submarine Base Sta." Groton CT
			USS Tullibee SSN-597

Cacheted

 

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