1927 -USA - Several Police departments in Connecticut install Teleprinters.
1927 -UK- Creed model 3A teleprinter produced. Operated at a speed of 49 bauds and printed on gummed paper tape.
1928 -USA- Pennsylvania State Police install a state-wide teleprinter network.
1929 - UK- London Metropolitan Police trial Creed 3A teleprinters between New Scotland Yard and Croydon Police station
1930 - USA- First inter-state teleprinter network installed linking New Jersey, New York and Pennsylvania
1930-31 - UK- Metropolitan Police Teleprinter network expanded
Creed Model 3 teleprinter - 1927
1931 -UK- Metropolitan Police replace Creed model 3 tape printers with new Creed model 7 page printers
Creed 7B Page Printer
Early Teleprinter Room and Telephone Switchboard
- New Scotland Yard
1931 - UK - Teleprinter switchboard installed
at New Scotland Yard
Teleprinter switchboard - New Scotland Yard
using Creed 7B Printers
1932 - UK - Lancashire Police install Creed model 7 teleprinters.
1932 - UK - Metroploitan Police connect to the Telex network allowing teleprinter links to other police forces in UK
World War II - UK - Metropolitan Police teleprinter network used to control air raid warning system for London
Metropolitan Police Teleprinter Room - 1950's
1948 - NZ - Teleprinter network Introduced using Creed model 7 machines