Spinthariscope-Crookes-1903, signed "spinthariscope, W. Crookes, 1903, R & J Beck. Ltd London", brass construction, full draw 1 3/4", closed, I " diameter, original leather case, compete with interior arrow and paper charged particle paper.

Wonderful image in the dark, these little jems are very rare and this one by the best maker.

Buyer pays $13 shipping anyw in the USA, Europe $25, Paypal only.