The standard eight cup model from the 1950's has large top opening for both decanters making cleanup easier than the thin neck varieties from the 1930's.
Negative Product Points
The larger rubber gasket, and sometimes a plastic gasket, can make a poor seal due to the size. The lack of a good seal can lead to a long vacuum pulldown of the coffee into the lower decanter. The thin necked Silex coffee makers have superior pulldown time due to the smaller gasket seal. However, I find the pulldown on the largenecked Silex superior to the pulldown on the Cory Rubberless models of the 1940's and 50's due to the rubber seal between the glass decanters.
A basic and fairly common model to be found for a minimal price of $20-$25. Combine the decanters with a Silex Lox-In glass filter rod over an older Silex stove will make an excellent cup of coffee when the simple steps are followed properly. Keep in mind that the glass coffee brewers make the best tasting finished coffee but only if good coffee beans are used.