Also look at the format. There's no TO, SUBJECT, FROM. Also, date should be flush with left margin, not at right. Signature block is also wrong, should be something like John Smith, Capt, USAF, Commander. Also, letters contain no unit designator followed by office symbol. If the commander or the DO were writing him a letter to convey an order it would be FROM: XXX Fighter Interceptor Squadron/CC or /DO.
The format is wrong.
The correct format in the 70"s would be:
RTAO: (Reply to Attention Of)
Subject:
TO:
Also, the signature block would be on the left margin.
Retired Chief. Have a great Air Force day.