Scott #634 P/Block With Two Interesting Features

I've just recently received a plate block X10 of Scott #634 with two interesting features,one is a line across the top of the block I think is an experimental electric eye feature,the other is a plate block #634-21149-UR10 variation (Encyclopedia of Plate Varieties page 167).
I'll leave this open for debate as I can only assume that these features are what I think they are.

These first photos are of the experimental electric eye mark




Gum breakers



This is the variation slightly different to what is described as UR10 but still located in the same place as UR10 (Upper Right tenth stamp along).




Feedback please

regards Harry

Edited for P/Block

Yes, Harry, that is an Experimental Eye Plate Block, and also in the correct format. If I am not mistaken, that plate number is actually the earliest EE plate, but don't hold me to that. Very very nice!

Those wavy red lines on the selvage -- I think they might be due to gripper cracks since it was a rotary press printing. Again, that is a guess on my part, since I do not know the exact locations of the grippers for that plate.

Thanks Kim and yes it would be interesting to know if it was a gripp or cracked plate.

regards Harry

edited to replace the Y with a T in Thanks (big fingers small keys)

Very nice block; thanks for posting it. Of course, I had to go off somewhere and read about Experimental Eyes

Experimental Eyes - isn't that what the six million dollar man had?

Very nice piece Nugget! Impressive.

Gripper Crack

A form of plate variety that occurs along the top or bottom row of stamp subjects on a printing plate. Tension cracks occur on printing plates most frequently where the grippers hold the curved plate to the cylinder. These cracks collect ink and deposit it on the printed stamps. Gripper cracks look just like a crack, jagged line, or series of lines running through the stamp design.

"Arree! Gripper Cracks" sorry all did over look that in Kim's post and thanks Bob for pointing it out,I hope this is still classified as a plate variation #634-21149-UR10.
KirkS you said in another thread your still learning something new every day enjoy .
and thanks Greg for that,it's just one more piece of interest for my collection.
regards to all Harry