Joined: Jan 2010
Posts: 9,779
Likes: 1,747
From: Northern California
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
I think that the shift bosses might have been added on at some time, either for dt shifters or for the benefit of using the cable adjusters.
The right-hand housing loops could have been for Weinmann, DiaCompe or certain Shimano calipers with their cable entry side being reversed.