Copper printing plate

[flyadive]

Going through some stuff, I found a few
Years ago. I posted it before but never got an ID. It measures 3 1/8" x 5 1/8" x 1//16" thick.
Thanks and HH

 

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[Ant]

It looks like a cover plate that was riveted into place, a cover plate for what?

 

[flyadive]

Definitely a printing plate. I have gotten an ID on a similar dug item. The print is of/ for what?

 

[sutphin]

WALL PAPER BOARDER PLATE.

 

[fowledup]

I've done work on some old buildings that had tin or copper plates somewhat like this one, although usually bigger but nailed in the same manner as this one. They were used as false ceiling tiles