![](https://coimages.sciencemuseumgroup.org.uk/41/177/large_thumbnail_1975_0359__0001_.jpg)
PMBX 3+9/12 switchboard.
PMBX 3+9/12 switchboard.
Details
- Category:
- Telecommunications
- Object Number:
- Y2003.22.17.1 dup 1
- Measurements:
-
Overall: 375 mm x 280 mm x 500 mm,
- credit:
- Gift of British Telecommunications plc