[GreenKeys] More mysteries

[Jim Cooper]

On 27 Jun 2020 at 9:41, John wrote:

> As you mention, there's no FSN that
> begins with 5815, and converting to
> NSN (add -00 - like
> "5815-00-XXX-XXXX") gets no hits.
> "5315" returns nothing as well. 

apparently not true ... 

at one point, Signal Corp technical manual 
numbers were converted from TM 11-nnnn 
to TM 11-[FSN]-type (op, parts, etc.) 



as you can see above, there are TM 11-5815- 
for various equipment.   The one cited at the top 
happens to be a Teletype Model 40 ...

>From the photo, I can't tell if the smudged 
stamped numbers in the middle are 690 or 890, 
but I got no hits on either. 



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