The SE bikes site just says that the bottom bracket is a "euro cartridge" version which just means that it's a standard diameter (68mm if memory serves me correctly).

Bottom brackets have a "spindle length" (i.e., how long they are) and an "interface" (i.e., how they attach to the crankarms). For a bottom bracket and a crankset to work together, the spindle length and the interface need to match. Pake cranks need 107mm or 110mm spindles and JIS square-taper interfaces.

You need to call SE and get some more info on the specs of their bottom bracket. Or, you can just buy the bike and take it to your local shop and have them figure it out. Removing crankarms is one of those "you need some special tools" kind of jobs, so you're going to wind up taking it to them anyway.