[Milsurplus] FT-164 crystal holder

[William Donzelli]

> But it looks like the same holder.  If so, it was probably used 
> in other Navy pre-war shipboard sets as well.

Perhaps, but I have only seen that form in TBO/TBX. I don't think the Navy
ever did settle down on a standard crystal in the 1930s - NT-40000 is
another style, used in some of the frequency meters. SE-3068 was another
one, used in the TAV-1 (presumably they were recoded in Class 40 for the
final TAV production runs). I think I have an NT-40001 floating around as
well, in still another style.

William Donzelli
aw288 at osfn.org