Carl Zeiss D Microscope Objective

Microscope objective signed "C. ZEISS" "D 0.16", serial number given on the nose of the objective is 10628. In brass can marked
on the lid "C Zeiss JENA", with "D" on the lid and base of the can.
Lens appears bright and clear when looking through it. The front element surface is in good condition. The brass is lacquered, its
condition can be seen from the photographs.
Length of can 5cm
Early 20th century