Possibly as old as the 1930s.
Used on literally hundreds of Martin guitars of that era.
Grover, gold-plated, removable worm shafts that are threaded at both ends; 7/32” dia. posts.
Three perfectly and smoothly working tuners plus threaded bushing and washer from another.
Components of 1950s-60s American-made Grover Imperial tuning machines.
Rare variant of Grover tuner.
Perfect for either 5-string or 4-string banjo of any kind.
An almost-complete set, with the cap on one of the treble-side tuners missing.
Full-size six-on-a-side set, clipped.
Complete with all mounting hardware.
American made, 6-on-a-side.
100% tight and functioning perfectly.
Seen on many Martin guitars of the 1930s and some of Gibson’s very top-flight instruments of the period.
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