523d Tactical Fighter Squadron. On 1 July 1958. On 18 February 1959, the 27th TFW was inactivated. The patch was for the period in between and uses the then Navy’s style of abbreviating a unit’s title. The item “Authentic Air Force USAF 523rd Tactical Fighter Squadron Bergstrom AFB F-101″ is in sale since Sunday, May 14, 2017. This item is in the category “Collectibles\Militaria\Vietnam (1961-75)\Original Period Items\Patches”. The seller is “zeustinker” and is located in Marietta, Georgia. This item can be shipped worldwide.