[Milsurplus] Choke indentiy sought.

[Kenneth G. Gordon]

I have a bunch of what look like Navy-gray power supply chokes all 
sealed up in metalized-canvas bags. They are labled the following:

SC-1019 (ES-700683) RETARDATION COIL 3340-308 708 060 (3CK-
1987-101)

1 EACH

CUST. ORDER NO. AF33(604)6731
CUST. ITEM NO. 4
WESTERN ELECTRIC CO.
GREENSBORO, N.C.
METHOD IIC 12-53

However, there is nothing written on the chokes listing inductance, 
current, or resistance.

Can anyone point me to where I might find the interpretation of this 
data?

Ken W7EKB