[AMRadio] Need transformer info

[Bill W2DGB]

Folks,

Can anyone tell me the specs for a dandy transformer with only the ID being the part number?

Looking for info on T-6878.

This follows the mid-1930s format used  by Thordarson before they went to the T-alphanumeric listing in the late 30s'. Of course, it could very well be some other mfr.  I need one like it for a repro of a Utah UAT-1 transmitter. 

Many thanks,

Bill  w2dgb