This version brings back the lettering in the gear cover, and are still of the "Pat Appld" era. They can be found with either the large or small lubrication hole.
They can be classified:
These been in a box..from a old women...that use to be her husband's.. who put grovers on his 1958 Gibson Les Paul back in the 1960's.. So they are Nice.. meaning your conversion, or original 1950's Gibson Les Paul OR Wherever you use, will stay "IN TUNE" with a solid not much use 56+ year old Baby!