[ARC5] Call for Data: A.R.C. "M"-marked Morgue Items

[David Stinson]

Items from Aircraft Radio Corporation marked with the yellow "M" 
in a circle are from the A.R.C. "morgue;" the archive they kept with 
examples of all the items they had manufactured over the years.
They typically have no serial number stamped on them
and most also had a yellow stamping with the type (i.e. "ATA").
As far as I have been able to determine, only one of each item 
was so stamped, making these pieces unique.  
Like the RAT and BC-474 lists, I'd like to compile a list of 
A.R.C. "morgue" items, both to keep track of them and 
to confirm that each is, in fact, a unique set
and, if not, just how scarce each item type might be.
If you have any of these items, I would be grateful to hear 
about and document them.  If you send me your data privately,
I will treat it as a private matter and will not divulge that
information without your express permission.
If that does not trouble you, I'm sure many people on this list
would like to hear about them.
Here is my (partial) list:
ATA CBY-23243 Transmitter control box.
ATA CBY-52211 7-9.1 MC transmitter.
ATA 7777 Phantom Antenna.
I *think* I have the ATA antenna switch,
one of the five-meter test sets 
and I know I have one of the earlier GF control boxes,
but those haven't surfaced from storage yet.
I also have an ATA TX dynamotor that is marked "ATA" in yellow
and has no serial number stamped, but is missing the "M,"
so it may or may not be morgue, but likely is.

Thanks for your help, 
David S.