Can you ID this air filter?

[504d]

Can anyone identify this oil bath air filter? I have a 1941 V8 pickup, and I thought this might be the correct Donaldson filter when i bought it on eBay, but the bottom doesn't match the description I've seen elsewhere in this forum, as it is not flat and has no D. It was advertised as fitting my vehicle, but if it doesn't I'd at least like to be able to ID it correctly when I resell it.

Thanks,
Steve