#545 blinking incandescent bulb.
This bulb has not been produced for almost 20 years. We have a very limited stock of NOS #545 blinking bulbs.
When they are gone they are gone.
Used in the backglasses of Twilight Zone (8 bulbs), No Good Gophers (5 bulbs), and Dirty Harry (4 bulbs).
Williams/Bally reference #24-8825.