In-good-condition ATE master cylinder for single brake disc setups. Came from a well-cared-for '77 R100/7 with 43,000 miles on it. Fits all /7 and all /6 with single ATE disk according to Max BMW Fische. Selling because I'm doing the brembo front-end conversion.
Shouldn't need a rebuild. Could use a nice cleaning with a brush and some de-greaser though.
Will ship same/next business day from San Francisco.
PM if interested.