The cover has never been described as completely and correctly in an auction catalog. So, why say ex somebody who did not appreciate the importance?
I do hope you have not, in any way, taken this as a criticism of your work, far from it.
I understand you there, however, (to me) it would have been nice to
read where the cover originated, prior to being described.
How it became to be broadcasted, how it may have been discovered etc.
being a very important piece.
I was thinking of the Stanley Gibbons battle of the little bighorn cover, and it's early auction in 1974, I found it fascinating to see it's journey to 2015.
Without it, a piece of history has just "popped up out of nowhere"
and it is poorer without it's passport.
But perhaps that's just me.
If one goes to a museum, and sees a Roman coin by Trajan, then that has some interest, but overall perhaps a wooden description.
If, however, it states "from a hoard, discovered in a Devon field, via metal detector, by 11 year old Michael Citizen" then the romance and wonderment of archaeology is enhanced.
At the million dollar sale, of the Blue Boy
Provenance is duly noted and the romance whetted in description...https://erivan-collection.com
Provenance: George H. Worthington (Private Transaction, 1915), Henry C. Gibson (Private Transaction, 1922), Alfred H. Caspary (H.R. Harmer Sale 967, 1955), Josiah K. Lilly, Jr. (R.A. Siegel Sale 312, 1967), John R. Boker, Jr. (Private Transaction)