Machine Cancel Balance Collection, six binders with hundreds of covers, including Barr-Fyke, Hampden, Barnard, Pneumatic, and Time-Cummins cancels (as well as various smaller companies), one binder with original patents for machine cancelling devices, additionally Doanes, duplexes, slogans, etc, many better items throughout for the machine cancel collector or dealer, mostly fine to very fine strikes, a wonderful group