Mounting holes centre to centre are approx 77.5mm and 74.5mm. 

Free shipping in USA/Canada!

Guaranteed working. 

Transformers have been tested (where applicable) by:

1. Fluke 45 Multimeter for DC Resistance

2. B&K 879B LCR Meter for Inductance (Henrys)

3. Transformer Neon Bulb test for shorts

4. Unloaded voltages with Current meter

I am a professional electronics technician with a surplus of working vintage transformers I am listing for sale. 

Let me know if you have any questions. Thank you!