30 LINE
100 LINE
4002
4119
4200-D
4253
7020
7030
47001
MX 5
OCS300
SAPPHIRE
UNIMAT
STC
SWITCHBOARD PICTURES - Switchboards that are unknown models
ASSOCIATED COMPANIES
STC
HISTORY
STC TELEPHONES
STC
FIRE SYSTEMS
STC
FACTORY PICTURES
WESTERN ELECTRIC MACHINE SWITCHING SYSTEM