Age of Dr. Grabows With the Screw-In Tenon?

[kitchnsink52]

Does anyone know when Dr. Grabow stopped using the screw-in tenon? I have a Viscount with a vulcanite stem and screw-in tenon. I am trying to figure out the approximate manufacture date. From looking online, it looks like the Viscount line began in the late 1950's and ended in the 1990's. I'm hoping I can get more specific than that, though.

 

[Piping Abe]

Dr. Grabow still produces the screw-in adjustomatic pipes. You have to mail-order from them directly

 

[kitchnsink52]

Dr. Grabow still produces the screw-in adjustomatic pipes. You have to mail-order from them directly

I did not know that, thanks. I've only ever seen the push tenons, so I assumed the adjustomatics were out of production.

 

[RustiePyles CPG]

Dating a Grabow is near impossible, they made very few changes for years. An ajustomatic Viscount could be anywhere from the 50-90’s. A picture would help though.

 

[kitchnsink52]

 

[kcghost]

It is a decent looking pipe.