strange symbol on a green capacitor!! what's it?
That's what we experts call an illegible misprint on a cheap, decades-old, replaceable for cents, capacitor.

Well, it's really something like

letter digit . 1 K


Now, correlating that with a table of [preffered numbers], the E24 series contains 1.10 and 5.10 as possible values, and  the illegible digit is then either a 5 or a 1.

Throw these away. Buy new ones for when you need them. Components of this quality can literally be had for cents.