113: INTERESTING 1877 IRON & BRASS ENGINE DEMONSTRATOR

A bench made (prototype?) model, the horizontal brass cylinder with iron on cast iron base, heavy cast iron flywheel, flat brass arm with numeral scale, stamped RN & CO PAT'D JUNE, 5 & 26 1877 on a circular top fitting.
Measures approximately 17 inches long by 2 inches to 5 inches wide by 4 inches tall.
Good condition, the intactness is not known.
$100 - $200