Unknown (Obsolete?) Capacitor Markings Green Caps
Yes. These are old mylar capacitors before a unified coding system was implemented. But the codes are easy to read, as during this period in history the nF was the point of reference unless xxpF was used to imply that this value was in pF. 0.03K meant 30nF. 0.15K was 150nF. 0.01 is 10 nF, etc

They look a little aged in the photo. You might consider replacing them with new ones.

Electrolytic capacitors had and still have the actual values on them, including a temperature spec such as 150C.

This is a photo of an old style mylar capacitor. 100.77 nF 100 volt.