[R-390] R-390 serial number

[Dan Merz]

Tom, in case you're still collecting R-390 serial number data,  the one I
recently picked up is contract 14214-ph-51-93  ser # 2064.  I assume this is
an early Collins-made radio as there was no mention of Motorola on the tag.
Is this assumption correct?  I was checking your list and assumed that a
Motorola radio on the same contract number would have Motorola indicated on
the tag.  In reading Medley's description of the green wheel I was unsure,
from what I read, about the differences between the Collins and Motorola
with regard to the green wheel.  Is it stored in a different place or is it
attached to a different location when removing the rf assembly?  My green
wheel is stored right at the top of the rf gears a little to the left of
center of the set.  On reading the Medley's material again just now,  maybe
the point is that there is a difference but it may not be a distinguishing
difference between Collins and Motorola sets,  perhaps each maker used one
of two arrangements or placement of the green wheel.  Dan