I just sold an '84 Peugeot (Unsure of model, but had a Carbolite 103 frame) that had 700c wheels, and my '82 Motobecane Mirage came with 27". Replacing a Helicomatic hub makes sense for the steel wheel, or maybe the original was damaged or something.

You may end up not being able to ID it, I gave up trying to figure what my Peugeot was, nothing in the catalogs seemed to match.