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From what I can see the sticker is not attached upside down, the panel is.


You may be right, it seems all the original stickers are upside down. It's strange, tho, as panels normally open from right to left as this one has in the picture. The panel here in my old office opens left to right, tho... as do a few others I find on the 'net...

Main breakers are typically at the top, too.

Gotta love standards...