Poor Perfs Ruin 1d Roo/Map 1st W/Mark Stamp

Torn twice...from top to Roo's back & bottom to map. Perf penetration was minimal leading to scissors use(?).

After examination of incomplete perf strikes....how many sheets were/could be perforated per strike & what was comb pin shape around tip.

Nice example Finches.
A keeper.
Scissor use? debatable, may have, or maybe 2 stamps on a cover and cut later, whom knows.
Not aware of the history of the perforations, but as far as I know, only one sheet per pass on the Grover.
Pins did become blunt, sharpened by grinding the faces of the pins.
Perhaps the pins were so often sharpened they had reached there lower limit it the Grover Block ?

I only have one similar, in my 300 or so examples. (both look like rough paper)

Consider a different theory ignoring the quality of the top/bottom perforations and thinking about how stamps were often used in everyday applications in that era ... a busy secretary needs to stamp several hundred letters each day and uses scissors or a paper cutter to quickly and efficiently make strips from the sheets. The primitive home-made coil strips will speed up the application time tremendously. Now all it takes is a quick lick, stick and tear to apply each stamp. Not provable, but I believe plausible and simple.

FYI.
Your stamp unable to be plated.
Severe damage left of the "O" of ONE, which is common in this stamp, but no direct comparison to others. Some damage indicates maybe a substituted cliche.