Originally Posted by SirMike1983

They appear to be- apparently that was a set up used in the Danish market. The hub dates are 12/64 and the Danish import number dates to 1965. The wear on the bike matches them always being there as well. I see no sign of previous stirrup brakes.

The set up is documented for the Sturmey Archer BF hub- it uses a horse shoe shaped yoke to move a lever passing between the brake reaction arm and the fork blade.

http://hadland.files.wordpress.com/2012/07/sabfbr.pdf