Early 20th Century Piston Cutaway Demonstrator by Welch Scientific uv The interior pages are in

The interior pages are in overall good condition

15" W x 21" H

and science kits

JM - 105023 - 011024

while the two smaller center lights use standard bulb fixtures

Early 20th Century Piston Cutaway Demonstrator by Welch Scientific uv The interior pages are inNo. 1753 (1 3) Gas Engine Model Four Cycle Engine W. M. Welch Scientific Co. Chicago Antique cast iron and aluminum piston cutaway display model. This piece is an early Welch build. It represents a cutaway of one of the many functional pistons manufactured by the company and features moving parts to demonstrate the inner workings. The Welch Scientific Company was an educational supply company founded in 1880 by William M. Welch in Maquoketa, Iowa. In