$200 is about what the hubs and the brake levers are worth, at least on eBay today...that may be a little exaggeration, but thassa good deal. The cranks are either record or very late model chorus. Alatas are not cheap, although this one could be, of course. I would like to see the sticker under the seat up close. That'll give us an idea about the build level of the bike. You are probably close about the vintage, although the pink stickers (if that is what they are) puts it closer to mid-80's. Any later and fashion would have dictated that the rear brake cable be run through the top tube.