No manufacturing stamp - exact production date and or company unknown.
NEVER INTENDED FOR THE GENERAL PUBLIC!
15.5 x 20.25 inches - used and abused by years of having been exposed to the elements (smoking drunks), but in overall great condition given that these just haven't survived due to their fragility. Finish that's still slick and shiny. AMAZING patina - just the way we like'em!
A must for any man-cave, bar, garage, game room - or better yet, to replace that horrible family picture over the living room fireplace!