Scott 766Scott 766 is the Farley Reprint version of the souvenir sheet first issued in 1933, Scott 730. The souvenir sheet, not previously discussed, was issued as one of two souvenir sheets for the Century of Progress Exposition in Chicago, also known as the Chicago World's Fair.
The souvenir sheets are identical; in point of fact, there is no way to distinguish a normal margin single from each other. The lack of gum on the reverse is not a valid factor, as it would be very easy to remove the gum from a single of Scott 730 to pass as Scott 766.
So how can these be distinguished from the earlier souvenir sheet? The only way is by the presence of the enlarged margins between the sheets, or as they are known, "gutter" singles, pairs and blocks.
Below is an example of a gutter single, followed by both horizontal and vertical gutter pairs.



Scott 766 was printed in sheets of nine panes per sheet. Unlike the National Parks centerline blocks, where there would be only one per sheet, this meant there could be four center blocks, or cross gutter blocks, per sheet. An example of the way they are normally collected, in cross gutter blocks of four, is shown below:

Even with the souvenir sheet whole, to qualify as Scott 766, it must have the large margins found on the outside gutters, contain part of an adjacent sheet or be in pairs. A vertical pair of sheets is shown below:

There is one possible way to make a unique position piece from an entire sheet. That would be to use the center souvenir sheet, and include parts of the other eight sheets surrounding it. This is shown below:

There are no proofs or essays for any of the Farley Reprints.
The First Day Cover selection follows. As with all Farley Reprints, they were issued March 15, 1935 in Washington, D.C. The first item presented is the Grimsland cachet in green, to match the stamp's color. This is listed as Planty-Mellone 766-1. I prefer to collect these with a gutter between to ensure they are Scott 766, although many collectors are satisfied with a cover dated March 15, 1934. This has a nice block of four with a vertical gutter between.

Next up is the First Day Cover cachet prepared by Harry Ioor. This features a horizontal strip of three with a gutter between the left and middle stamp. It is listed in Planty-Mellone as 766-2.

The next selection is a striking piece of Art Deco imagery. This cachet by Fairway is done in purple and green. It is listed in Planty-Mellone as 766-12a.

Ralph Dyer is credited with creating the cachet shown below. This feature a vertical pair with horizontal gutter between. It is listed in Planty-Mellone as 766-27b.

The final selection for this issue is the cachet prepared by F.R. Rice. It has a block of four with vertical gutter between. This is Planty-Mellone 766-32.

The next installment on this thread will discuss Scott 767, the Farley Reprint of the 1933 Century of Progress three-cent souvenir sheet.
As always, comments and questions are welcome. If you have anything to share related to this thread, I'd love to see it.