Ok now I see them

. Mine looked just like that until I changed the socks to black. You should hear those speakers with the old caps replaced with Solen,Mundorfs,Sonicaps or Northcreeks . Including replacing the sand cast resistors with Mills resistors. The sound difference will be like looking through a dirty window and then having someone to clean it.
Just replacing the resistors and bypassing the fuse is a worth while improvement and not expensive. I never had any problems burning any thing up and the speakers sounded much better with those fuses out of the signal path.