7558th squadron ?

[bananamafia]

could anyone point me to any detail on what or where was the 7558? i cant seem to find anything and picked up this sign recently.

any pointers greatly appreciated as always

[jwp]

USAF 7558 AIR DEPOT GROUP OPERATED THE SEALAND AIR DEPOT AT THE ROYAL AIR FORCE (RAF) STATION AT SEALAND, FLINTSHIRE, WALES DURING THE EARLY 1950s.