Old-style, strip-mounted tuning machines impart a real vintage vibe. The posts have the vintage slot and vertical hole so you can insert the string end in before winding for additional security. They are sold in sets of 6 only; Right side or Left side. 15:1 Gear Ratio.
(Click on images to enlarge)

This GK1RC tuner set mounts on the Right Side
of the peghead as in this example. These tuners require
the Vintage Style tuner hole size of 11/32 inch.