Atom 440 pedals were more common than the 600s and 700s. Don't know if they had the same axles or not. I may have some 440s but can't recall for sure. They were used on a lot of Raleighs. The 440s, I think came in two widths which would mean two axle lengths. The 700s came in at least two widths as well -- they made a cute little track pedal.

I like the Atom pedals, but they are not as well made as the Campagnolo pedals of the era -- not by a longshot. Not nearly as well made, in my opinion, as the MKS Sylvan road pedals of today. But, I like them anyway.

As for being a Campagnolo copy, I don't know. Pedals of not so different design existed as early as the 1880s, according to the quill pedal museum.