More communication with Brandon today---I was right, this is Lochcarron's version of Douglas Modern Black (aqua and black with the thin white stripe---simply a color variation of regular Douglas) than the STA 1029 version (green and black background with the white stripe replaced with a red one) which is what I wanted. Not that it is not a beautiful tartan, but it is not what I wanted, so I will have to await other opportunities.