[Milsurplus] RE: LM Manual

[Receiver]

Robert & All,

I have a LM-21 here, that is a reworked Hoffman LM-16.  It has a new large 
plate on top from the Mare Island shipyard marking it as an LM-21 with a new 
lower serial number.  The aluminum front cover of the calibration book is 
the original one that came with it from Hoffman with an additional line 
engraved near the bottom "LM-21 Ser 683" (I think that's it).

My .02, John, W4NET