Hello
I'm looking to get some information on my chip set. I think they were made by Asprey in London UK at least that's what it says on the inside of the box. I've tried getting in touch with aspreys but they say they have no archivist so they couldn't give me any info. So I'm here.
Info I'm looking for -
When they were made?
What are they made out of?
Why theres two black chips with pot written on them?
Has anyone seen a set like these before?
Does it have any value?

Any info would be appreciated

Thanks