I dunno. Modern capacitors are likely to leave off units entirely, leaving you to make an educated guess.
"104" is probably 0.1uF (100nF) "22" is probably 22uF if its an electrolytic, 22pF if it's a disk. IN NO CASE WOULD MILLIFARARDS BE A GOOD GUESS!
You have a stock of WW2 disposals parts?
I've got cold-war and 70's computer stuff, and some newer stuff that presumably doesn't have a good excused.
It didn't take me long to find these:
