Title:
Watermark detector. Morley-Bright 'Inst-A-Tector' watermark detector, in case and boxed. III. White card box, plain, with sticker on bottom side, and typed captioning: 'THE MORLEY-BRIGHT INST-A-TECTOR, WATERMARK DETECTOR SG ITEM NO. 2565' 'FOR GREAT BRITAIN AND WORLD STAMPS' 'STANLEY GIBBONS PUBLICATIONS LTD, LONDON AND RINGWOOD'.