It sounds like a heresy - but this is the 1970s, after all!
The Pattern: Vogue Couturier Design 2788 (Pucci)
The Scrap: Eeek! Tucked inside this pattern was a heather-y orange polyester doubleknit! The color doesn't look as orange in the scanned image as it looks in real life, but trust me - it is true to the 1970s. :)
And a bonus! Also tucked in the envelope was the original Vogue Couturier design label, for sewing inside the dress.