Three Patent Models

Description:

Three Patent Models, "School & Family Slate," No. 60,356, December 11, 1866 to J.H. French, with lesson cards and pencil sharpening sand paper, ht. 10 1/2 in.; "Slates," No. 199,332, September 26, 1871, to T.D. Ossone, with numeric sliders to each side, both with (detached) Patent Office labels; and Egg-Beater, No. 58,770, October 16, 1866 to C.H. Butterfield, with specification, but lacking label.
Estimate $100-150

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