One New Aftermarket Replacement Fits John Deere Ignition Switch w/ Keys that fits Tractor models:
(1020, 1520, 2020, 2030, All Prior to Serial # 117499).

Part Number AT21880

Models This Part Fits:

1020, 1520, 1620, 2020, 2030, 350, 440, 440A, 440B, 450, 540, 540A, 570, 570AAdditional Information: 8 Amp4 Position4 Spade Terminals

Reference Numbers:

AT21880, AT21880-A, TP-AT21880, TP-AT21880-A