#455 Bulbs Bayonet
Automatic blinking bulb. 6.3 Volts.
These bulbs are used in many backboxes for decorative effects and as part of timer circuits on electromechanical games.
Williams Part No #24-8802
Used in Addams Family / Funhouse / Whirlwind
Sold as a Singular Bulb or in a Pack of Ten.