FG 300 tuner pegs

This is the rare MIJ FG-300 with the straight bridge pins, vs. the normal curved arrangement.

By the lower number I'd guess the upper number would be 410?? or 411??.  So, it was made in October or November 1974.

Any tuner with a 6mm shaft will work.  Today's standards are 1/4", which will not fit in the slightly smaller bushings.  Changing the bushing is a pain in the ass and can easily damage the headstock.  Whatever you use, you will have to drill new mounting holes.

These have the single hole at the bottom.  You might get lucky and they will line up, but I doubt it.  www.amazon.com/Guyker-Guitar-Machine-Heads-Handed/dp/B08F2FWBHY/?th=1  They have a very fine 21:1 ratio, and the price is right!!