Vintage Brass Steam Engine Valve Gear Demonstration Model gloecker the mortar and pestle is

the mortar and pestle is lightweight

Blade shows oxidation and surface rusting but retains function

Atlanta Stove Works

The book appears to be in good condition

Vintage Brass Steam Engine Valve Gear Demonstration Model gloecker the mortar and pestle isBrass steam engine valve gear demonstration model produced to illustrate the operation and timing of steam valve mechanisms in a compact, highly visible format. The model features a heavy spoked flywheel, exposed crankshaft and connecting rods, brass cylinder and valve chest, and adjustable linkage mounted to a finished wooden base. All major mechanical relationships are left uncovered, emphasizing motion, sequencing, and mechanical interaction rather