GPO / POST OFFICE SERVICE
WB 1400
This was the 2nd Generation UK Nuclear Attack Warning system, that superseded the
WB 400
system.
TI A8 J1201
Click here for further information
BACK
Home page
BT/GPO Telephones
Search the Site
Glossary of Telecom Terminology
Quick Find
All Telephone Systems
Last revised: March 04, 2025
FM2