Here are 1950 standard air cleaners for trucks.

Git_Er_Dun,
Are you referring to the air cleaners at the top left ("small air filter in my 1951 truck with copper mesh inside") and the top right ("same air filter mounted on top of a large oil bath canister"}? If yes, does the one on the upper right have an oil bath and/or is the bottom chamber a Silencer?

Here is the optional oil bath air cleaner for 1950 light trucks.