HO-13 & SB-620 coils - furthermore

[myname]

A few more tib-bits:

FWIW: the part nos. I posted should all be preceded by "40-".  

Also:  40-588 & 40-589 were vintage 1963 pieces that became obsolete 2/28/66, at which time 40-774, 40-775, and 40-776 were introduced.  Then, on 11/21/66 the 40-774 became obsolete, and the 40-807 & 40-808 were introduced.  I have no other revisions beyond 9/15/67.

Vy 73,
Tom N 

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