Title:
Watermark detector. Electric watermark detector in box with lens and plastic colour filters. Card box in two parts, held together by metal staples, base has card padding for the detector, an information leaflet, and an 'IMPORTANT' note on how to assemble the detector for use. Lid has a sticker attached, but slightly torn. Red, white and orange in colour, reading 'The PHILATECTOR ..lectric WATERMARK DETECTOR' 'H. & A. WALLACE. 94 OLD BROAD STREET. E.C. 2' with a photograph of the detector on the