I've got a transformer that I'm pretty sure was rescued from a broken Agilent "system multimeter" based on the 34401 years ago, that I haven't found a use for. See if it matches yours?
Label on it says:
9100-5608 REV B
TRANEX
14-7522
232760 10 01
Primary wires are brown, brown/black, green, green/black, red/black, yellow/black, orange/black, black
Secondary wires go to a big female connector meant to plug into a PCB header: green, blue, green, orange, orange, red, white, red