I have aquired a frame of an old ten speed Peugeot, not sure which model but it is in nice condition and I should have everything I need to build it but I have a question about the rear brakes. The brake bridge is actually drilled from the underneath, like someone had fitted a hidden mudguard bolt. How does the brake caliper fit? All brake components on the frame are Mafac parts and the original brakes (I have everything apart from the calipers) were clearly of the centre pull variety. Is there some weird Mafac caliper which mounts like this? I looked at Mafac calipers on ebay but judging by the pictures, they all mount in the normal way.