This sign was recently uncovered. It is a working electric light up wall sign. It appears to be made of plastic, and metal hardware. I have not cleaned it with anything. It is just as it was when I found it. I believe this sign was somehow involved/displayed in a bowling tournament. I am not sure of the exact history behind the sign. There were 3 generations of men that were all said to be very good bowlers. This leaves a broad span of 1930s to the 1980s that this sign may have been used as advertising during tournament play. It is aproximity, 35 cm wide and 31 cm tall. I have taken front pictures with it lighted and just as it is, as well as the only visable mark on the back.