GPO - CLOCKS



ADVERTS - Speaking Clock posters
BRILLE CLOCK - Shipped to Lagos by GEC
CALCULAGRAPH - Used on trunk switchboards
CENTRAL TELEGRAPH OFFICE (CTO)
CLOCKS - The full list
CLOCK UNIT, GMT 34
CLOCK UNIT, GMT 35
DEAL - TIME BALL
DISTRIBUTION OF MEAN TIME - Overview diagram - 1925
DISTRIBUTION OF TIME IN THE BPO - Description
DISTRIBUTION OF TIME SIGNALS - Exchange buildings - Pictorial
DISTRIBUTION OF TIME SIGNALS - Exchange buildings - Description
DISTRIBUTION OF TIME SIGNALS - General time distribution to and from the CTO.
DISTRIBUTION OF TIME SIGNALS - Article about time control in the PO - 1930
DISTRIBUTION OF TIME SIGNALS - Extract from above - GMT to CTO and Rugby
INTERNATIONAL TIME - POEEJ article for 1928
INSTALLATION IN PUBLIC OFFICES
INSTALLATION IN TELEPHONE EXCHANGES
MAGNETA CLOCKS
MECHANICAL CLOCKS - Description (Wind up)
PULSE CLOCKS - Description (30 second)
RECORDERS, TIME, ELECTRICAL - Used for time stamping forms in Telegraph offices
RECORDERS, TIME, RADIAL - Clocking in/out machines / Time recorders
RELAY TYPE 90A
ROYAL OBSERVATORY - GREENWICH - Apparatus and Buildings
SPEAKING CLOCK - Mark 1
SPEAKING CLOCK - General Information on all clocks and voices
SYNCHRONOUS CLOCKS - Description (Mains)
TIM - Speaking clock
TIME - Post Office overview
UNIT, CLOCK PULSE No. 1
WATCHES
WATCHMANS SYSTEM - Gents
WIRING OF ELECTRIC CLOCKS

 

ARTICLE ON BATTERIES USED ORIGINALLY ON GREENWICH TIME SIGNALS

BROKEN SUSPENSION SPRING! - Click Here

EDDIE MAIR TALKS ABOUT THE SPEAKING CLOCK

ERICSSON TIME RECORDERS

GET YOUR PULSE CLOCKS WORKING WITHOUT A MASTER CLOCK
 


Prefixes

A - Pulse type (DC)
B - Synchronous type (AC mains)
C - Mechanical type (non-electric)

Mechanical clocks are always odd numbers.


QUICK FIND - Clock Thumbnails

 

Click here for Simon Taylor's GPO Clock site

 

 
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Last revised: January 06, 2024

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