1953 is what they are calling the year of this Motobecane Pantin on ebay right now:
1953 old bike 57cm Motobecane PANTIN Monfor Stronglight Marcel Brampton LAM Atom


Just for seeing for this thread. It looks like it has a headbadge of even older vintage, it looks like it has been fully restored.

Just as an assist of something else they call a Pantin Motobecane, how curious, if this is from 1953, it to me, does not even look lugged: