Having had a shot of one of Aero's Dehens, I'll vouch for the quality/style - I'm not surprised bikers back in the day wore them for protection as they are hell-a-heavy.
An interesting comment, especially when compared to the view of so many around here, those who state that a heavy, leather, cafe racer is not a "real" riding jacket.
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My new 70th anniversary Langlitz sweater by Dehen. Everything I've read about these guys here seems to be true in this sweater. It is heavy, stiff, and solid!