TP - Telephone
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Possibly SCR system nomenclature, short lived. if the TP-1 was 1940, it would have been replaced by "TA" in 1943 by JETDS.
- TP-1, TP-1-T1 balloon telephone
- TP-2, TP-1-T1 balloon telephone
- TP-3
- TP-4
- TP-5
- TP-6 rotary desk phone
- TP-7
- TP-8 ringer
- TP-9, field phone W/ amp
- TP-10
- TP-11
- TP-12
- TP-13
- TP-14
- TP-15
- TP-16
- TP-17
- TP-18
- TP-19
- TP-20
- TP-21
- TP-22
- TP-23
- TP-24
- TP-25
- TP-26
- TP-27
- TP-28
- TP-29
- TP-30
- TP-31
- TP-32
- TP-33
- TP-34
- TP-35
- TP-36
- TP-37
- TP-38
- TP-39
- TP-40
- TP-41
- TP-42
- TP-43
- TP-44
- TP-45
- TP-46
- TP-47
- TP-48
- TP-49
- TP-50