British Post Office Cathedral Daily Test Box Galvanometer PO 70 Morse Telegraphy

British Post Office Cathedral Daily Test Box Galvanometer PO 70 Morse Telegraphy

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Country of manufacture

UK and Ireland

Categories: Technology, Communication

Description

Offered for sale;
BRITISH POST OFFICE
DAILY TEST – BOX GALVANOMETER
P.O. 70 GPO 70
The silvered dial with beveled glass brass bezel hinged cover,
engraved
SENDING / RECEIVING A ZINC CURRENT
three diagrams for the heavy brass circuit board and plugs
CONTACT   EARTH DISCONECn   RECEIVE
silvered labels to the three terminals
In very good cosmetic condition noting shrinkage split to the veneer on the arched top.
A rare and early instrument, described in the 1909 edition of The Telegraphists’ Guide as “a neat combination of test-box galvanometer and plug-switch in use at certain large offices”
http://www.museumoftechnology.org.uk/objects/telegraphy.php?cab=teleg_galvo#k1213

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Dealer information

GB Cog Scientific

As a fine art sculpture graduate I have applied my appreciation and understanding of form and function to my lifelong professional career in the antiques trade. Over forty years dealing in what I considered worthy, within the fields of decorative arts and sciences, I have always purchased over a wide spectrum and look forward to offering an exciting variety of stimulating pieces.

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