Okito-Nielsen Visible Block Penetration:

Visible Block Penetration. Las Vegas: Okito-Nielsen, third Generation. . A solid yellow wooden block slowly and visibly penetrates a sheet of plexiglass bisecting a large wooden tube. The block can be seen to pass through the divider in slow motion. Height of tube 13 ½”. Original instructions. Hallmarked. Never used as we opened it to photograph. We took photos of the opening process.

estimate $600-800