For sale is a set of vintage three/side. Model mg2 is in gold, mni2 in nickel. Gibson Custom Shop L5 Gibson custom shop, Archtop guitar Tuners on 12 fret c. Martin slotted headstock tuners . One with a solid another with a slotted headstock and the factory workers preferred the audibly different sounding slotted version. With these headstocks, tuners are built into the holes. It also includes the eight slot headed mounting screws. This version was known as the fern. Sort of like spoke wheels on a harley, slotted headstocks just add a special something to certain guitars, and takamine is happy to offer some of the best. When i was a kid (a long time ago) i didn't care for the looks of the slots as they looked too much like nylon string guitars, which i didn't care for at the time either. Martin guitars martin guitars produced from 1833 to 1929, with necks built with 12 frets clear of the body, generally have one of three styles of tuners: 5 out of 5 custom...