Finding additional motor specs

Hello list.

I just bought two Allen Bradley motors, catalog number 1326-DPA4B.
The only specs listed on the name plate are:
Full load current 11.2A
Tach. Voltage: 154.8

Below those two lines, it says "At rated armature voltage" - I guess
that means both current AND tach - or just tach voltage?

Is there a way to figure out other specs, like rated voltage, from
these two numbers, or will I have to try to get it out of Allen-
Bradley or the manufacturer, "MFD. by Peerless-Winsmith, Inc.
Warren, Ohio"

I connected one to a pair of old batterys, it pulled .55A at about
22.5V, and the tach output was about 17V.

Of course, if it was really an AC tach the 17V dc my cheap meter
read is pretty meaningless. I've seen reference to AC tachs on the
net, can someone tell me how likely that is?

It looks like I may be able to remove the tach assembly and mount an
encoder inside the end of the motor - that wouldn't cause any
problems, would it?

Thanks for your time.
Mark