Obscurity factor: 8
This 1970's Bollywood film is all about adventure. S. S. Kumar (Dharmendra) is a petty thief who cons his way into the estate of Sir John Locksley (Rex Harrison) who is hosting a house party. Little does Kumar know that the guests are all master criminals and Sir John, who is dying, is picking a successor to the title of greatest criminal mind by tempting them to steal the fabulous Shalimar diamond from him.
This film is available on DVD and can be seen on YouTube, however the upload has no subtitles. The first installment is posted above and begins with a fun dance number that you don't need to speak Hindi to understand. The soundtrack was released and is still known in the Indian music scene.
Obscurity factor: 8 (known in its native India, relatively unknown in the states, on DVD)