Looks like that Bauer model may normally have come with a 3 phase, 400 Volt motor rated at 7.5 hp. I couldn't tell from the specs I found, but there were probably other options. Hopefully there will be a spec plate on that motor to identify the the voltage and amp requirements.
You can quickly tell about the phase question by looking at the power cable. Three phase will have 3 hot wires plus one for ground, a total of 4 wires. Single phase will have 2 hot wires plus ground, and has the disadvantage of drawing more amps which requires larger wire sizing.
I don't have much info on the European Bauers, but that is basically the equivalent of a very popular US version often referred to as a Mariner. The block is the same, and filter tower is same. US version with a 7.5 hp motor will put out 7.5 to 8 cfm actual volume, and is rated up to 5000 psi. The PE 250 refers to Liters Per Minute, which is roughly 8.8 CFM by a slightly different way of calculating the discharge volume. The PE "might" stand for Poseidon Europe. Anyway it is a very popular basic block in the US. Lots of them in use at dive shops and fire departments.
Correction, the PE refers to Poseidon Edition.
The older I get the better I was.