Day 305/17. A surprise find from the past.

In clearing out my home office today I came across a set of car keys at the bottom of a box in the bottom of a cupboard.
Its the second key set for a BMW.
The thing is I have only ever had one BMW in my life. This was when I joined a new company as an employee and was issued it as a company car for the remaining 4 months of its lease contract.
This was a black BMW 535 automatic. But the date was, I think, April 1984..... So these keys have been sitting in my possession for 33 years....... What a shocker !!!
What else will I find in my clearing out?