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I acquired this ascender in 2017 as part of Bob Thrun’s collection.
This ascender is 103 mm. tall, 81 mm. wide, 28 mm. thick, and weighs 157 g. The rope channel is 17 mm. wide. The cam radius increases from 39 to 53 mm. over an angle of 36°, giving a 27° cam angle. The tooth pattern is (1S1.2S2)^2(1S1)^4(1.2). There is a cylindrical cam stop above the cam.
The inside of the shell is stamped with an incomplete "P" and the rear with "<WIS>."
This is a direct copy of the Petzl Basic. The cam casting is sloppy, and several of the teeth are little more than nubbins. I would prefer to use the original rather than this copy.
WIS is Walkosz i Spółka, or Walkosz & Co. in English. They are from Bielawa City in Poland. Thanks to Mikołaj Miętek for providing this information.
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