From the Hammond 1750 output transformer series, this is listed as a drop-in replacement for a Fender Vibrolux Tweed, 5F11  -  they're supposed to look similar to the original Fender transformer where possible.  Materials etc are also supposed to be similar to get as close as they can (within reason I suppose).

I have one on order for one of the small PA heads that I picked up recently, so see how it goes when it arrives later this week.   It was a bargain, at $76 +GST from Mouser, including free delivery. 

• 8,000 ohms plate to plate
• 16, 8 & 4ohm secondary windings (these options would not have been on the original)
• rated at 15w
• bobbin wound

Turn Ratios

4 ohm turn ratio     44.77  (2004.35)

8 ohm turn ratio     31.58  (997.29)

16 ohm turn ratio   22.38  (500.86)

Frequency response

75hz to 15khz  

Inductance

19.66H

HAMMOND 1751M OUTPUT TRANSFORMER DATASHEET