Mark Zenier wrote:
Older radios will have mica capacitors in place of ceramics, which
became popular in, judging from the stuff I've scrapped over the
years, in the 1950s. They look like little black or dark brown dominos.
Mark Zenier Washington State resident
You are right of course, but the OP's radio is relatively
young in this context. From looking at Groer's website I
assumed this model comes from around 1960.