UK MIS HOL Cartridge Tester

Item number                           :           UK MIS HOL Cartridge Tester

Origin                                     :           United Kingdom

Maker                                     :           HOLBORN, London

Markings                                :           “FIELD 233 HOLBORN LONDON

CARTRIDGE TESTER

REGD JUNE 15^th 1865

No 4723″

Biggest length                        :           69 mm

Weight                                     :           50 grams

Materials body                       :           Brass

Paint                                       :           N.a.

Table clamp                            :           N.a.

Condition                               :           Good

Repairs                                   :           None

Remarks                                 :

I don’t have a clue about how this tool works. I haven’t found any literature about it. So anybody who can supply me with information is welcome.