Here are some images of another vintage microphone transformer: the Altec Peerless 15095 (simple not the "A" version).
Sonically they have a good midrange, slightly highlights, do not get into trouble in the complicated steps; they haven't a very wide soundstage in all directions, with little air around the instruments.
Anyway an excellent transformer for MC cartridges with transformation ratio of 1:10.
Good performance with my Denon 103, Denon 301 MKII and EMT TSD 15.
For other step up take a look here ;)