I've had five 1973 Internationals, and yours looks just like them. A couple of mine are posted earlier in this thread.

When I was a senior in high school (1973), my dream was to have a Nishiki International. At the time I had a POS Schwinn Continental. But I could not afford one, so I never bought it. Go figure, I have found five in the last year, four were my size.

My last one, I changed out the stem shifters, installed aerolevers, everything else is stock. It also has the original pedals, which aren't installed on these pics.