Comprising the undermentioned accessories, mounted on 1 1/2 meter long, double rod, senior optical bench with steel C.P. rods.
I Biprism holder
II Adjustable slit
III Micrometer eye piece
IV Automatic lens holder

Same as above but both rods of the optical bench covered with brass pipe

Same as above but without optical bench

A. on bakelite base
B. on aluminium/brass base

Also known as Bird & Cage
Apparatus A. Hand operated
B. Battery operated

Wooden, nicely polished, box Form

A. Iron painted
B. Brass C.P.

Wooden, nicely polished

Fitted on metallic base

Fitted on metallic base