[Drake] R-4C PTO Gears & S/Ns

[Don - W7DAH]

I'd be curious to know about the various types of gears in folks' different serial number Drake 
R-4C(s). I know that early S/Ns were all plastic and later there were combo metal & plastic; I 
wonder if any were ALL metal?

I have an R-4C with S/N 24210 that has partial metal gears and partial plastic gears, I have 
a second R-4C S/N 22165 that has all plastic. 

How about others out there? What kindda gears, at what S/N, do others have in their R-
4C(s) out there?

Thx & 73,
Don - W7DAH