from a collection. Long Out of Production. Older decals so take proper precautions such as testing a small decal you don't plan on using or clear-coating the entire sheet, etc.
As shown in pics: The top left F-15A sheet for Streak Eagle, etc is old enough it predates the blue envelopes and just comes in a cellophane wrap however the colors look fine with the backing sheet slightly yellowed. The A-7D and Bicentennial F-111 sheets are open envelopes but the colors look great for their age. The other 3 are still sealed in their envelopes.