[Milsurplus] replacement question -

[John Hutchins]

Question - Silver Mica capacitor replacement .

"Normally" the Silver Micas never need replacement but if they have to 
be replaced is could that be effectively replaced with a modern ceramic 
with the appropriate
tolerance and temperature characteristics.  which leads me to this 
question:  In WW2 what were the typical characteristics of a Silver Mica 
capacitor?

Just shoot me for asking.
Hutch