Hmmm.. Did I stump everyone?
I tried looking at the Patent for it but I don't see a gasket.
http://patentimages.storage.googleapis.com/pages/US2772648-0.png
BTW, that patent should have expired a long time ago. They were 17 or 20 years back then. Perhaps you should start making them! They took a long time to unscrew, and the corrosion problem was a problem, so I will stick to my plastic bailer, but you might be able to sell some of either metal or carbon fiber.When the patent has run its course, somebody should bring them back!
Interesting there were two versions. I looked at the patent diagram, and the upper diagram shows the screw in version that Sunfish used. The other drawing is the pop up, which looks like a better idea. I wonder why Alcort chose the screw in version. Possible it was a cost decision. BBNeither one of them is threaded. I've never seen a threaded version. The stopper on mine just pop up and neither one of them are corroded.
I have two De Persia bailers. One of them is on my 1973 Viking. The other one is from an early 60s Scorpion. Neither one of them is threaded. I've never seen a threaded version. The stopper on mine just pop up and neither one of them are corroded.