Can someone help me identify these capacitors?

I have posted pictures of them he
http://www.home.earthlink.net/~circu...apacitors.html

These are on the tonal board of a 1974 Capehart stereo. The bass has always
been a bit distrorted, more so when the bass is turned up. It's not very bad,
but annoying enough.


My questions are, what type of capacitors are these, and how do I identify what
their ratings are?

What is the difference between the orange types shown, and the green ones
shown?

What I could find, I think K and M are supposed to mean their tolerance. With K
= 10% and M = 20%. Is this correct?

For the ones with the minus or dash symbol inside a circle, does the minus/dash
mean something? What about the letters of R (C1,2) and N (C11,12)?

The parts have the following information on them:

C1, C2: 473M
100 - R (the minus sign is inside a circle, as shown in the
pictures) These are orange capacitors.

C3, C4: .015
100 (?) Not sure what the (?) is. I think on one it looks like a
7 but I could be wrong. These are green capacitors.

C5, C6: 222K These are orange capacitors.

C7,C8: I wasn't able to access these. These are also orange capacitors and look
similar in size to C5, C6.

C9,C10: 50V - 1K These are green capacitors, fatter then C3, C4.

C11,C12: 223M
50 - N These are orange capacitors, with the minus or dash
sign inside a circle, as shown in the pictures.

Thanks for all who can help me deciper and understand the code!