I just went and looked at it. It's an interesting model. I would guess around 1980ish... maybe a bit older due to the headbadge. It seems odd that is has a chromed fork tips as all the older one I have seen have been did not have this. My friend has an '82ish international and they weigh a ton. Again I am suprised it only weighs 24lbs, but I guess a light component group like 600 may be able to account for that.