Looks good. Maybe as good as a Brooks B-17. But at least as good as a Fujita Belt saddle. Nothing to sneeze at, in my opinion. Never heard of a Sadem saddle though. If you can find a Tariq Aziz seatpost, you might just have something there.
jim
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Cross Check Nexus7, IRO Mark V, Trek 620 Nexus7, Karate Monkey half fat, IRO Model 19 fixed, Amp Research B3, Surly 1x1 half fat fixed, and more...
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SB forever