Binocular bifocal periscope, type CK.11, number 282, made by Barr & Stroud Ltd. Binocular bifocal periscope
Cardboard folding periscope, closed to flat pack 15 x 17.5cm which opens to 45cm length with 32cm between mirror centres. Two hinged mirrors fall into place when opened. Designed for the 1937 Coronation. Patt.App.25973/1936. Instructions printed on the side. c.1936. The Vimos periscope 1931-1941
Binocular bifocal periscope, type CK. 11 number 272, made by Barr and Stroud Ltd, comprising the following four parts Binocular bifocal periscope
Stereoscopic periscope by Carl Zeiss, Jena, one prism loose, in leather case Stereoscopic periscope by Carl Zeiss