In many ways this machine is a classic English design. It is elegant yet simple. Really, one of my own favorites. It is named after the Australian maker "Herbert Ernest Martin", who emigrated to Sydney along with "John Deveroux" and "Richard Crook". All three makers set up working businesses and made some very fine double basses, though the strange thing is that though living, working and making in Australia, we still think of their instruments as being English. Rather perverse really? It is sadly not likely that "Martin" ever had the chance to use such good machines. They come with a screw and washer which must be used to hold the cog in place. These machines suit any instrument.