Ungummed, Unperforated?

I came across a block of 10 1933 Century of Progress (Chicago) 1-cent stamps that are ungummed and unperforated, but has the "Bureau of Engraving" legend. So my question/s is: Is it unusual to come across stamp blocks that were printed but didn't get to the gum and perforate process?

I'll also say that this block was obviously sliced out of a larger sheet. Not horribly, but noticeable.

It is part (cut up) of a regularly issued souvenir sheet, catalog #730
Don

This issue is part of a group known as "Farley's" or "Farley's Follies" and yes, what you have was issued ungummed and unperforated.

https://stampsmarter.org/1847usa/Fa...Follies.html

I guess that's why a used one is worth more than an unused one. Who would want to bother with gluing it on an envelope?

The original souvenir sheet was issued in 1928 and was gummed. The Scott catalog number is 730.

Postmaster General James Farley gave some ungummed press sheets (sheets right off the printing press before they were cut up into the souvenir-sized panes) to some friends. The uproar caused them to make ungummed press sheets available to the general public. You could cut them up into the same size as the original souvenir sheet, but the fun was in creating gutter pairs and cross gutter blocks, involving stamps from one pane, the gutter or border between them, and stamps from an adjacent pane. Horizontal gutter pairs, vertical gutter blocks, cross gutter blocks and other configurations are only possible on the reissued, ungummed, sheets, Scott 766.

You'd think that would be the end of it: if it has gum, it's Scott 730, and if it doesn't it's Scott 766, right? Not so fast! The post office offered to gum any full press sheets that collectors mailed in. So you have six possibilities:
1. Unused souvenir sheet with gum, Scott 730
2. Unused souvenir sheet without gum, Scott 766
3. Regummed souvenir sheet, Scott 730
4. Any "gutter" configuration, or any size other than the originally issued souvenir sheet: from Scott 766
5. Used example with a date earlier than the issuance of the ungummed press sheets: Scott 730
6. Any other used example: Scott 730 or 766, whichever is cheaper.

I think most collectors assume a used example is Scott 730 since the ungummed ones were so difficult to use.

Farley gave away ungummed press sheets of the 1934 National Parks series, the Byrd souvenir sheet and the regular perforated Byrd commemorative, the two Chicago souvenir sheets, the Mother's Day, Newburgh and Wisconsin commemoratives, the APS and Trans-Mississippi souvenir sheets, and the blue Air Mail Special Delivery stamp. They are assigned Scott numbers between 752 and 771.

@reb608 or anyone else: I'm old and easily confused, so the basic question, as always: Is my little ungummed block or two worth anything more than basic sentimental/art appreciation value?

The option folks back then had to send tthem to the post office (at the cost of postage -- a money-loss proposition) to have them gummed is a hoot. (It might've been the first time the Amish and skinflints were heard saying "What the heck, Marge! There's something wrong with these stamps!! What the heck, man.")

They regularly sell for between $5 - $15 depending on a few factors.