Wheel & Axle.
This design of the traditional wheel and axle eliminates the usual cumbersome fork and pointed pivot bearings and replaces them with a simple axle and simple bearing.
The GS 301 has four pulley steps, each with a small hole drilled in the rim for attaching string.
The stainless steel axle is mounted in a ball bearing which is embedded in the center of the molding. (Shownd at bottom of illustration.)
Wabash #GS 301.
Forensics Lab Supply Number 3178301.
Formerly Grau-Hall Corporation dba Grau-Hall Scientific.
All products shipped from Wabash, Indiana.