MICA AND SILVER MICA CAPACITORS
PHILCO Mica Capacitors are flat bakelite stamp sized square blocks or small “pez” sized pills or even small cylinders.  They are found in the high frequency tuning and detecting stages of the circuit.
These caps are very durable and rarely need replacing unless they are way off value, damaged or open.  If they need replacing it’s usually because they are open.  By NOT replacing them, you can reduce the amount of possible re-aligning required to get the set working well.
Mica Caps are usually measured in pF (Pico farads) and sometimes nanofarads, and not uf (microfarads).
As long as we are talking about Mica Caps, they are also used in the PHILCO Bakelite Block Capacitors. The block numbers they are used in are :
8035-D
8035-ODU
8035-EU
8035-OEU
8035-DG
8035-ODG
8035-SG
8035-DU
8035-SU
8035-H
8035-G
8035-E
8035-F
8035-K
8035-L
8035-C
8035-B
8035-P
And are listed as 110 pF.  Do NOT use 0.001 caps, use silver Mica 100 pF caps like the small one at the top of this page