I had one pass through my hands (thankfully) just a couple weeks ago, but it was a Mixte. I only wanted to scrounge a few parts off it and gave the rest away: it was enormously heavy.Yours looks like a much classier and svelte model (double butted steel pipe!)and some good components, too. But my impression is it's just another mass-produced Japanese bike-boomer, yours still has all it's CPSC reflectors and "safety levers" so maybe around 1974(?).