Saw a lot of 4 covers on eBay
with basically nobody bidding on them. I saw this cover and figured I'd toss a few bucks at it and actually won the lot for $3. This is the one that caught my attention
Improper use of the postage stamps ? I can't think of a domestic rate of 6¢ during this time frame unless it was way over weight. It appears to be some type of payment ?