Vass high-lace wingtip blucher boots in dark brown calfskin with a single leather sole (F last). The boot pictured above is actually one of mine, although I didn't take the picture. A friend of mine recently got the same pattern on the same last in Color #8 shell cordovan with double soles for wear as winter boots, and he absolutely loved them. I can see why, although I think that a single sole is the way to go with these -- a single sole fits with the sleekness of the last and the narrowness of the toe.
Alden saddle bals in Color #8 shell cordovan with a single leather sole (model 994, Barrie last). This is one of the few regular-production shell cordovan models that Alden makes with a single sole. I wish that they would make more -- there's no reason why shell cordovan shoes all have to be double-soled gunboats.