Does anyone happen to recognize this E? Maybe it's a long shot, but it surely was not alone on a product. I looked pretty hard to try and find its buddies, but with no further luck.
The rounded edges reminds me of Volvo's font. (By the way, does anyone have a font name from the old Volvo ads? This one.)
Oh, and here's an extra hint at how this may have been mounted.. It looks like a small nail hole or something.. It's got some dirt in it.