For all of you who participated in the quiz the answer is Croll.
I decided this winter that I wanted to find a local (Minnesota) bike or frame to build up and started a search for either an American or Mark Zeh. In the process I came across this raw Croll. I have always liked lugged bikes (see Trek 900 thread ) so was exited with this ones construction. A bonus was the nice brazing on the rear. The guy i bought it from said he acquired a bunch of frames from Walter Croll at the time he sold the company in the late nineties and that they were never painted or built up. He also said it was probably built in the late eighties or early nineties. The guy seemed to know what he was talking about, the frame was nice, and the price not too bad so I took a chance.
Not that I didn't believe the seller of the frame but I wanted a little stronger history. Finding information on Crolls is challenging, however, since the company is gone and they were never that prolific. That being said they have a loyal following among owners and do have some racing history. Upon asking around Minneapolis I was put in touch with Eric Noren
http://cromsriddleofsteel.blogspot.com/ at Peacock Groove Bikes http://www.peacockgroove.com/ and was a welder for Croll while it was still owned by Walter.
I brought the frame into Erik's shop and he was exited to see it. He confirmed that it was indeed a frame made in the early Nineties (he was unsure of an exact date) by him and Walter.
As an aside; Erik is crazy. See this interview
So to make a long story longer; I asked Erik about fork and stem options and he remembers some of the frames being suspension adjusted. He mentioned a Rock Shox Judy as a possible fork but we both agreed that it would be cool for him to make a brazed rigid and custom stem. What is also cool is that he still has all the design information and specs filed away somewhere which he is going to dig up. He also has original decals and paint color charts.
As far as components go, I envision an XTR 900 build since I have a bunch stashed away but we'll see.
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Thread: Croll Frame