[Collins] Collins Part Numbers

[JR. Bittner]

Hello Group.

I?m new from Germany (southern Bavaria), name is Juergen and my callsign 
is DF4IR.

One specific question:
I have a few parts from Collins from which I want to know where they 
come from. They are mixed with miniature tubes and oval shaped transistors.
I can read the part numbers (e.g. 543-1351-004 BAL MOD) , know what they 
do. But what radio they were built in is unknown.

Trying Google (or else) I found a PDF for current part numbers but not 
for older ones.

Anybody out there, who can give me a hint?

Thanks in advance.

Best regards.
Juergen