Want to see Guide Lines!

president Harding memorial issue,perf.11,issued Sept.1st,1923.

 

Huguenot-Walloon Tercentenary,issued May 1st,1924.

 

Philadelphia Exhibition,issued May 10th,1926

 

Issued July 25th,1928

 

Battle of Fallen Timbers,issued Sept.14th,1929.

 

Postage Due,perf.11,issued 1931.

 

defintive coil-line pair,issued June 24th,1932.

 

Penn commemoration,issued Oct.24th,1932.

 

Issued Oct.24th,1932.

 

Issued July 7th,1934.

 

National Parks Year,issued July 16th - Oct.8th,1934.

 

same set

 

same set

 

Same set,imperforated version,issued March 15th,1935.

 

This stamp,issued March 15th,1935 is the latest one with a
guide-line,I own.
I wonder if selvage-markings like the following were a replacement
for guide-lines:


But I don´t know.
From here on there are only some line-pairs,I can show.

 

1938 definitives,coil-line-pairs.

 

same set

 

Liberty definitives,coil issued April 3rd,1973.

 

Scott 374A Booklet pane center position guideline Earliest Date known used.

 

Richard,
how can you be sure that this is a booklet stamp ?
Did take it off from the card to check the (sideways) watermark ?
If not,how did you make the watermark visible ?