Belstaff's roadmaster jacket is much like Hunter Wellingtons - they're classic pieces that you'll have in wardrobe for eons. Problem is, not everyone has half a grand to throw away on a jacket you might wear 50 days of the year. Good thing we've got J.Crew's comparable option for less than two hundred dollars.
Belstaff's roadmaster jacket is black waxed cotton (waxed=waterproof, fyi) with four large cargo pockets in front. It's got some great details - shoulder stitching, a buckle strap fastening at the neck, a concealed zipper, and corduroy trim (love that). The gold-tone studs are a classy detail, and this is a jacket that would add an edge to any weekending outfit.
J.Crew's boyfriend fatigue jacket is a heavy cotton slub, with four large cargo pockets in front. It's built just like your bf's, but made to fit you. There's been a lot of care put into the making of this jacket, from the individually piece-dyed cotton to the detachable hood. I like the heavy cotton construction, but probably it's not waterproof (as if you don't carry an umbrella anyway).
Belstaff roadmaster jacket, $545, Net-A-Porter
J.Crew boyfriend fatigue jacket, $148, J.Crew