Hey Tom- just a heads up..
Thanks buddy!

I'm all over it, these are hard to find little buggers. I think a commercial convection oven maker in the 70's and 80's used these and said use has long ago absorbed the large quantities of NOS examples once available.

I have some Dynaco MKVI's that use these to delay B+ from the SS power supply while the tube heaters/filaments get up to temp.