Experimental slotted cone valve
1912
Stentorphone valve
1912
Mushroom valve soundbox
1912
Stentorphone valve
1912
Fine cut Stentorphone valve and seat
1912
Stentorphone soundbox for needle cut
1912
Zernike galvanometer, by Kipp und Zonen, 1920-1930
1920-1930
Reaumur bath thermometer
before 1929
Replica concave diffraction grating
1913, 14 November
"Quantotar Addiator" calculator for addition and substraction of British Weights
1924
"Addiator" calculator with stylus and pencil
1924
Impulse sender (dial) A.T.M. Co. 1930
1930
Wheatstone bridge
1915
Experimental selenium cell
1915
Molle No. 3 typewriter, c. 1918
1918
Blickensderfer typewriter
1920
H.M.V. internal horn gramophone, c. 1920.
1920
Autodial No. 2 (repertory dialler) - 50 lines
1930
H.M.V. portable gramophone model 101, 1925.
1925
Corona folding portable typewriter, c. 1922
1922
Remington portable typewriter 1920
1920
Bar Let typewriter
1925
Experimental small cone diaphragm soundbox
1912
Burndept needle-armature gramophone pick-up, c. 1930
1930
Vacuo-junction and holder (latest type)
1930
Marconi 'ganged-condenser'
1912
Small experimental air soundbox for gramophone
1912
Cuff's recorder magnetometer by Muirhead
1914
Moll thermal converter, by Kipp und Zonen, 1925-1930
1925-1930
Moving-iron voltmeter and ammeter (two movements) by the Record Electrical Co. Ltd.
1920
Earthenware jug
2000-1350
Silvertown patent portable testing set
1922
Philips H.T. unit type 372, 1928
1928
Canvas and leather pouch
1914-1918
Canvas and leather pouch containing 7 sealed packets of dressings
1914-1918
Canvas and leather pouch
1914-1918
Canvas andleather pouch
1914-1918
Canvas and leather pouch
1914-1918
Canvas and leather pouch
1914-1918
Canvas and leather pouch
1914-1918
Canvas and leather pouch
1914-1918
Everyman Four wireless receiver
1925
Surface plate, 12" x 8", 1915 in wooden case
1915
Crystal detector
1914
Earthenware oil jar
2000-1350
Earthenware oil jar
2000-1350
Earthenware oil jar
2000-1350
Earthenware dish
2000-1350
Alabaster kohl pot
2000-1350
Solid bronze phallic amulet in form of priapus with hind legs and tail of horse
30-200