Available here is a new box of 10 lamps, Delco brand L57 Incandescent bulbs.
This is NOS stock.
Common uses are: Clock light, high beam indicator light, turn signal indicator light and rear license plate lamp.
Specifications
Base: BA9S/Bayonet
Watts: 3.36
Voltage: 14
Lumens: 25
Amps: .24
Length of bulb: 1.07"