1938 RCA Knob
Price:
$10.00
Used on various consoles and table models. This one fits onto a 1/4" flatted shaft.
models: 86K, 86K7, 87K, 87Y, 88K, 88U, 88U2, 810K, 810K1, 811K, 812K, 813K, 816K, 84BT6, 85BT, 86BT, 86BK, 86X, 87X, 86E (chairside), 87EY (chairside), 85T1, 86T, 87T, 810T
Also: Delco R-1173, R-1174, R-1175, R-1176, R-1177
Dimensions: 1" wide, 5/8" tall, fits a 1/4" round shaft with a wide flat.