French, c.1900, printed to the inside of the lid 'The Huntington Textilscope, Trade Mark Regd 441,307, - Marque Deposse Pats Pen'g Brevet - London Eng' the instrument finished in black and chrome complete with charging rod, in a faux leather case with cream velvet and silk lining

Footnote: patented desk model double gold leaf electroscope for determining the purity of wool, silk, cotton, linen, fur and feathers.