I had a 1950's black and white s-f movie marathon the past two days in celebration of completing my novel draft.
The Land Unknown. UPI lost-continent movie with surprisingly good special effects and a bunch of actors with great legs. The best of this lot.
Tarantula, another UPI film with John Agar. Nukes, big spiders, cows get eaten, Nestor Paiva does a Walter Brennan impersonation.
I Married a Monster from Outer Space: As bad as the title implies it will be. Woman notices husband and townsfolk are getting a little possessed. But she has a big bosom, so the alien husband falls in love with her despite never having experienced love before.
Kronos. The description says it's about an alien machine that lands and starts sucking up energy, which would be interesting and topical, but that's only 10% of the movie. Another 10% has boy scientist, girl scientist, and boy scientist on a romantic vacation in Mexico, which they either didn't notice is strange or was ground-breaking for its day.