Mike wrote:


I'm nearly done cleaning the chasis of this S 85. All that's left is where
the ink stamps are. One stamp is an inspectors' mark. Another says Mark
1A with the number 199907 under it. The last one is a square box with
I.F...109, R.F....60, and F.T....T46..T18. Anyone know the significance of
these numbers?? I've got another one of these that I'm listening to as I
clean & it has the same markings with different numbers (but the same
inspector OK'd both of them).

Probably IF and RF are intermediate and high frequency, respectively,
and FT is final test. I suspect the numbers are employee numbers of
yhe people who did the tests and alignments.

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