Postal Stationery cut squares

I would like the readers to add a comment on this subject.
The scott catalogue has a price for each of the USA and its territories Postal Stationery cut squares.
All the other countries, Postal Stationery cut squares, are not collectible items (not mentioned in the PS catalogues). What is the reason?
Some history. The complete postal stationery collection was popular until World War I. Later collectors have noticed that it takes too much space.
Most collectors have decided to continue and collect these as cut squares and added these to the regular stamps album. The collectors interest of the complete Postal Stationery items has been back during the 1960th .
BTW this is the time that I have started my Postal Stationery collection.
I have hundreds of world wide interesting Postal Stationery mint and used cut squares.

Yes, I just recently (within the past year) have renewed a friendship with my U.S. envelope cut squares. Postal Cards are definitely an "entire" item instead of a cut square. To me anyway...

At the turn of the 20th century, some albums still had sections in them for overseas (non-US) cut squares but inclusion of this area of collecting seems too much work for so little interest.

Having purchased an H&G reprint and have contacted the last buyers of the H&G rights, it seems to have gone into the dumpster again pertaining to upgrading a catalog of that SIZE. It was a monstrous task and since the '70s / early '80s when the supplements were stopped, the work may have added at least another 25% in size.

H&G, in its current condition is "old school" and would need a serious face lift. Not as bad as say Forbin's 1915 World Revenues catalog, but it seems to have been copied tooooo many times.

It would take some good people a few years or more to complete it and that would be if they had the examples handy and some inkling to current market trends.

As of the past 5 years or so, I have sent my overseas cut squares to a few distinct people who seem to be carrying the torch - or were, anyway.

My U.S. have a renewed place in my collecting, but not a front seat. I'd say they're up there with Federal (not local) revenues as per my interest. Some of them are still pretty neat to look at and there are plenty of challenges when collecting them.

Have fun with them... I hope to, someday, get around to sorting them out and using that section of my catalog as much as the rest.