Hi
These are a nice little 3.0 KVA unit. The M5 is 125 3 phase and the M6 is single phase. They are very quiet little units much quieter than most military generators.
There major draw back is that they are a manual load adjust so the voltage varies with the load unless you are adjusting them. This has meant that they are not really very practical. However it is quite easy to add a modern automatic voltage/load control on to them.
I've had and used mine for years.
Link to the manual
http://canadianmilitarypattern.com/Generator.htm
Cheers Phil