J have no markings of other cables .. and Klotz, Roland.
with a midi cable that does not transmit any signals (death.. dustbin live) I do enjoy my monitor all MIDI cables (all pins one by one) with the help of a tester, well, J was surprised to find a midi cable brand Yellow Cable with 2 pin will not submit more, yet the cable has not more than 2 years and has never been bullied.
like what the qualitée MIDI cables is not to be underestimated.
I recommend the brand KLOTZ.
test your cables!