The specs are exactly the same as an International. There is no way that bike is supposed to have 27" steel rims. Originally it would have been 700c alloy. If not I'd be very suprised. If those araya's are laced to Suzue hubs I bet they are originally from the Nishiki... My guess it that it is similar tubing to the international and that is Tange 900 which is similar to Tange 2, both are a 4130 chromoly but they had hi-tensile stays...