Both of mine had those same sugino Maxy cranksets and the same suntour... what is it, VT-lux? VG? derailleurs, the same shimano 333 hubs, dia-compe brakes, and the same cool quick-release seat and headset cable hangers (though I stole the ones on my wife's for my schwinn). If the kokusai is 74, let's say, I'd bet this is a 75. Or 75 and 76. It'd be interesting if the stays are hi-ten because they're so thin.