I have found, in the parts boxes, what appears to be a potted power
xrmr. Here is the information I can get from the side of the unit:
Tresco No. P560 (not sure if Tresco is/was a company or not)
Working voltage to gnd.
PRI. A-B,---------- 165V
SEC. H1-H2,-------- 10V.
SEC. P1-P2,-------- 406 V.

This unit may have come from a non-working NC57. Can anyone tell me
what it is supposed to be used for? Does anyone have a use for this
xfrmr?