Watch List notes:

Means of Imparting Security to Bank Notes and other Security Documents & c. Patent Extract for Alfred Edwin Bawtree Patent No.27,763. London, Nov. 29, 1911. Fine.
Self covered. Small quarto, 18cm by 25.5cm. 6pp, back page blank. One specification drawing. Manchester Free Library oval stamp at top left of cover. Obscure patent with one drawing, but rare.

Estimate: $40.00- $60.00