"DoN. Nichols" wrote in message
...
...
Anyway --- the meniion of them coming into the market in the
late 1960s says that it is almost certainly a silicon diode. :-)

Enjoy,
DoN.

I think I remember diode, thermistor and flasher versions. I didn't
like that they made the hot base of the bulb protrude above the
socket.
-jsw