Reporting question for Vacuum Tube - 6L6WGS, Black Plate, Short Bottle, Made in China

Product:
Vacuum Tube - 6L6WGS, Black Plate, Short Bottle, Made in China

Question:
Bought a quad for a project amp where I am converting it from 7355 to 6l6-oids amp They look really cool like late 1960's tube construction (think 6av5) with the very large mica spacers on the top of the structure. I also like the side getters on these and I enjoy looking at the amps as much as listening to them. They aren't getting pushed that hard so I would think they last a long time.