In the mid-1950s, an archaeologist/adventurer in a fedora and leather jacket traveled to South America to seek native artifacts said to have been given by the gods to the Inca.
He battled rivals including other archaeologists, and Communist agents.
He ran into an old girlfriend.
Sounds like Indiana Jones & the Kingdom of the Crystal Skull, doesn't it?
Before Harrison Ford as Indiana Jones...was Charlton Heston as Harry Steele in Secret of the Incas!
Never heard of it?
It's never been released on home video in any form in the US or UK.
But we at Atomic Kommie Comics acquired the poster, scanned and digitally-remastered it, and are offering a bunch of kool collectibles, including t-shirts, mugs and other stuff with this hard-to-find art, available to you at Secret of the Incas Art
A number of sources including Raiders of the Lost Ark costume designer Deborah Nadoolman acknowledge the brown leather jacket, fedora, tan pants, an over-the-shoulder bag, and revolver w/holster came from this film. (Deborah wisely left out the scarf!)
SotI was filmed on location in Peru at Cuzco & Machu Picchu (the first time that a major Hollywood studio filmed at the archeological site). Five hundred native Indians were used as extras in the film.
As for the plot elements...judge for yourself...
While it's not available on video, as an Atomic Kommie Comics freebie bonus, here's the link to the Internet Archive's mp3 of the Lux Radio Theatre 1-hour adaptation of the Secret of the Incas starring Charlton Heston, himself!