Kay Silvertone Thin Twin electric guitar knobs tone/volume 1950s
The off-white knobs both have their set screws. The top of the words on both knobs show wear.
Kay Silvertone translucent electric guitar knobs later 1950s early 1960s
These were used on a variety ofKay guitars (K673, K672, K580, K775-Jazz II, etc.)Silvertone (Kay-made)Speedster/1445, Swingmaster, etc., model guitars. These are push-on knobs. No set screw required.