Technical manual: M11 Monarch Call Connect System / Auxiliary Features / and Supplementary Information
Technical manual: M11 Monarch Call Connect System / Auxiliary Features / and Supplementary Information
Details
- Category:
- Archive
- Object Number:
- 2015-493
- Materials:
- paper (fibre product), metal plated (unknown) and plastic (unidentified)
- type:
- document
- credit:
- BT Heritage and Archives