See "encased postage stamps"

Here is an auction listing https://stampauctionnetwork.com/y/y106637.cfm

I've never considered the possibility of the practice returning with a value based on inflation priced forever stamps. Not sure if stamps are really used much anymore. I have an envelope of forever stamps but I think it's been 10 years or more since the last time I used a real stamp.

See "encased postage stamps"

I've never considered the possibility of the practice returning with a value based on inflation priced forever stamps. Not sure if stamps are really used much anymore. I have an envelope of forever stamps but I think it's been 10 years or more since the last time I used a real stamp.