Welp

Hi CABE members,
​I believe I’ve uncovered a "Holy Grail" ephemera set for the 1970s Schwinn lightweight era. I have the August 2, 1976 corporate dealer letter from Thom Smith (Sales Promotion Manager) regarding a promotional poster recall.
​The Context:
The letter explicitly orders dealers to "remove and scrap" a previous poster because the "illustration is incorrect." Specifically, the poster features a Super Le Tour 12.2 description, but the bicycle in the photo is clearly a Chicago fillet-brazed frame (Superior/Paramount style) instead of the Japanese lugged frame.
​The Survivor Set:
Against corporate orders, this dealer kept the "error" poster and filed it with the original recall letter in the attic. It has been tucked away for nearly 50 years.
​The Companion Bike:
To round out the set, I have a Full Chrome 1978 Super Le Tour 12.2 (Headbadge: 0268). It serves as the perfect reference piece to show the "correct" lugged construction and decals that should have been on the poster.
​I’m looking for any historical insight or a ballpark valuation for the complete set (Letter + Error Poster + Chrome 12.2). Has anyone else seen a survivor of this specific "scrap order"?
​Attached are photos of the "Scrap" letter, the smooth joints on the error poster, and the Chrome 12.2 in my garage.
​Thanks for your time and expertise!