These are the Kluson Deluxe, NOT the Gibson Deluxe Tuners as used in 70's-80's
"Kluson Deluxe" in TWO vertical lines on the ribbed metal tuner cover. On the bottom side of the tuners stamped into the metal it says "D-169400 PATENT NO." The exterior lubrication holes are the large type. On keystone tuners, the buttons become have a slight green tint to them. These tuners are often called "Double Line, Double Ring".