[GreenKeys] TT-34

[Charles Ring]

Edward Greeley wrote:

> The "(XN-1)" part of the nomenclature indicates that this is/was a
> pre-production or prototype unit. The "/AG" part indicates that it
> is/was intended for airborne use (the A) in telegraph (teletype) service
> (the G). The 26.5 VDC further indicates airborne use. It was procured
> under a Navy contract, according to the contract number on the
> nomenclature plate. I suspect the unit is of early 1950s vintage.
>
> Ed Greeley

Prototype - that explains its "retro" appearance; the "styling" had not been
applied yet.