Visibility meter MkII by Casella London, MO 1434/43, cased
Science Museum Group
© The Board of Trustees of the Science Museum
Visibility meter MkII by Casella London, MO 1434/43, cased
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Visibility meter MkII by Casella London, MO 1434/43, cased
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Visibility meter MkII by Casella London, MO 1434/43, cased
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Visibility meter MkII by Casella London, MO 1434/43, cased
Science Museum Group Collection
© The Board of Trustees of the Science Museum
Visibility meter MkII by Casella London, MO 1434/43, cased
Science Museum Group Collection
© The Board of Trustees of the Science Museum