Who pictures motors with the stamping sideways?!
You could always try contacting them to ask.
Both companies have been around a century, though the general construction reminds me of motors popular about 60 years ago, considering the stamped markings instead of a riveted on plaque, or sticker. You'd probably have as much luck narrowing it down by asking Berkel or researching about the slicer model #. Since you don't know the slicer model #, possibly sending them a picture in a good orientation, or searching yourself for Berkel slicer pics.
