Thank you for viewing. This is a set of FENDER USA 60s mid-70s mid-F key Mustang tuners. These are Fender's original Mustang tuners, commonly known as "F key" tuners, with the "F" stamp. The Mustang switched from Kluson tuners to these "F key" tuners in late '65. The "F key" tuners for Stratocasters have metal knobs, but the ones for Mustangs are characterized by their octagonal plastic knobs. The base plate shape of the F key tuners from the mid-70s onwards is different, so according to my research, the tuners for Mustangs from the mid-60s to the mid-70s can only be replaced and installed without additional modification with the tuners of this listed shape. As a side note, I also used tuners of this shape on a 1970 Stratocaster. (As shown in the photos, they are also compatible with Stratocasters and Telecasters from this period.) According to my research, Stratocasters and Telecasters from the same era also used F key tuners of the same shape, so if you don't mind the material of the tuner buttons (Mustang's are plastic, Stratocaster and Telecaster's are metal), they can also be used as reproduction parts for Stratocasters and Telecasters from the same era. Sold as a set only, not individually. These are vintage items. To avoid issues such as swapping, please purchase with the understanding that they are non-refundable/non-returnable, and for those who understand vintage items. The Stratocaster in the photo is not included.