A fine and unusual  set of Perkins tractors. Patented in 1896, this beautifully cased and fully signed  set has a removable chamois divider. They are  slightly smaller and more pronouncedly  tear-shaped than the other sets we’ve seen. Length: 2.4″ The case is covered on top and sides in red morocco leather and green leather on the bottom; the hook and eye closure is intact and functional. Included among our images is Gillray’s 1801 satirical drawing of the tractors in use. For an excellent discussion of the history of this marvel of medical quackery see the Duke University site that is linked below.