When I returned today it wasn't a happy conversation so I didn't take time to photo but it clearly wasn't marked Manufrance. It was marked Manufearn 11. Instead of a head badge (last photo - says Fearn"). I've since accessed Mr Google and noted that Manufrance had several different variations of headbadges but none looks anything like this one.
The name Manufrance entered into it because I was looking at the bike in the rear of a very dark and dirty garage. I asked if it was a Manufrance and seller simply said "sure" in a neutral voice. Had I pulled it out in daylight I'd have seen what it really was. It wasn't until @
bertinjim pointed out the correction that I realized it wasn't a Manufrance.
The farther I get from this bike the clearer it becomes to me that it's an oddity and perhaps a dangerous one.
Perhaps I'll recontact the seller and drop my offer to $75!😜