I recall a story, some time ago (1970s or earlier) of some rich person trying to leave a country (which was allowed) with their money (which was not). So they

I recall a story, some time ago (1970s or earlier) of some rich person trying to leave a country (which was allowed) with their money (which was not). So they converted their money to platinum, had wrenches and such (normal car-owner tools) made out of the platinum, and drove out of the country. For extra believability, smear a bit of oil and grease here and there on the tools. I read about this in the 1970s (yeah, I'm old). Can anyone supply concrete details?