Benchmark was/is a small semi-custom knife company originally started by famous knife designer Blackie Collins. The knives,of which I have one, were beautifully made. The most common steel was 440C. Wasn't able to find any reference to a Roldex model, but the one I have was purshased in 1985 for $85.00 thru the North American Hunting Club(NAHC) which was still in its infancy. Its a folder, 3 inch flatground 440C blade, with either Cocobolo or Bocote wood scales. 6 7/8 inches long, and quite flat in construction. Has the NAHC logo etched on the blade. You might check your local bookstore or library for infor; or try A.G. Russells website. He carried/carries benchmarks on occassion.