Do any of the filaments flash white when you power them up from cold?
I havent powered them up, but will see.
What does a white flash mean/signify?
I have have/have had many of the "crimped top" smooth plates; that is the final type that they made.
My Fisher branded Tele's don't flash.
Interesting. Are smooth plates generally earlier or later than ribbed? Or is that too simplistic?
I've only seen Mullards flash personally.