Hello all - this is a modification of a post where I had really confused myself - sorry to those who had no idea what I was talking about. I've had a pair of Campy, NR, I think, side pulls for a while and never put much thought into the fact that the cable enters on the drive side until I built up my first bike with braze ons on the same side and thought, hey are these out there? - Is it a British thing? I know in England they used to make the left lever the rear and the right the front. Will post pics but am not in the same place as the bike at the moment and there's not much to show except a side pull that enters from the right ...

I see a Galli rear caliper on your pic with the cable coming from the left, non drive side of the bike.
Not rare at all but it is a sign of a mid to higher model caliper for most brakeset manufacturers. Some bike manufacturers will offset the top tube fable guides to one side or the other of the bike, sometimes to match up with what calipers the bike is equipped with, but it does not make too much of a difference as you just have to provide the correct amount of cable and casing to have the cables reach the caliper cable casing stop and clamp, but longer cables and casing do affect the feel of the brake, making them a bit mushy if the cables and casings are too long. What side of the caliper the cable is mounted, does not have anything at all to do which lever on the handlebar controls it. Although it is most common on bikes to have the left (correction, I wrote in "right" previously) lever control the front brake. Anyone can switch this to be on the left, depending on their personal preference

IYou're still seeing that picture? - I posted that by accident, well, in confusion. I modified the text and removed the pic, or so I thought. It's the Campy calipers that cable on the right hand side, that I found unusual. Can't post a pic of them at the moment but I will. I've always routed left lever to front brake and thought that was the standard in the US, no?

I would not say routing the front brake to the left lever is "standard". Most bike factories and retailers do it that way, but lots of people have it switched over the other way because they just prefer it, plus most motorcycles have their front brakes controlled by the right lever, with the clutch controlled by the left.

Yes, a few bikes have come to me the other way around, particularly a Major Nichols tourer with braze ons that made it a bit awkward to reverse the cables, but I did anyway because I'm accustomed to it and you really don't want surprises because you forgot your levers are reversed on one bike.

I have a pair of Dia Compe 500G calipers on my 78 Motobecane Super Mirage (not original) that are drive side cable pulls.

I've seen drive side brake cable stops on lots of French and British bikes that were originally equipped with center pull brakes. On one I solved the problem by by using Weinmann side pulls. I'm sure they're the commonest wrong-sided brakes. On another, I resorted to removing the stops and using top tube cable clamps.

Thanks for all your replies. Seems I've got a fairly uncommon set of Campy wrong siders. They may be moving to the frame with the right side braze ons.
Weinmann does seem to be the most common. Couldn't find a single Campy set on eBay. My guess is they offered them during the time many people were switching to side pull and then stopped making them. And the ones on bikes that needed them stayed with the bikes. All speculation, of course, but I can attest they exist. They are not pre '78, btw.

Someone resorted to removing the braze ons on a Raleigh International frame I'm restoring - debating whether to have some brazed back on the opposite side so they could accommodate either type of brake. Or just go with clips.

Meaningless without pictures

Can't take them right now, but it seems people have been able to answer my question without them. Appreciate all your responses.