Colin,

You were "spot on" wi' your comparion with the Mackenzie tartan:

The "McLeod" tartan (also known as McLeod of Harris) was a Black Watch variation (yellow and red over-stripes) adopted by Maj-Gen. John (Mackenzie), Lord Macleod upon raising the 73rd McLeod Highlanders in 1777 (renumbered 71st in 1786). The tartan was originally called Mackenzie, not to be confused with the Mackenzie tartan worn by the successor Highland Light Infantry, although the yellow stripes may have originally been the buff of the early Mackenzie pattern, which changed to white ca. 1800.

-- http://www.regiments.org/tradition/tartans/mcleod.htm
Cheers,

Todd