old caps > 8 years or so are black...newer regular caps are blue with a gold band.
SL caps are all blue, and there are either 15 K regular caps or 16 K screw-in ref. caps....the newest ones of course are the 35 K monsters( which we have in both, blue or white...doesn't matter which color), also screw-ins.....and in the Stratos / Kismet cases they all stand up...however, they are very tall and thus have to be laid down in the Khartago cases.....standing up or laying them down however, doesn't make any difference in sound.....
And nope, they're not made by Mundorf...they all are actually German / French made....