My best guess is that this is not an actual named tartan, though those who said Murray were very close.

The Murray tartan normally seen today is the Murray of Atholl (aka Atholl district). This is based on the Black Watch, with a red line on every green portion, and a red line on every other blue, with the alternate blues having the two double tram lines in black.

However, this is not what you see here. What you see here is very close to another Murray tartan, the one recorded in the Vestiarium Scoticum and not too common these days. That one has the red stripe on the green only, and the black lines on the blue follow the normal Black Watch pattern (every other one having a single pair of black lines in the center, alternating with blues with a double pair of black lines to the side).

Given what we see here pictured, it looks like this tartan has only a single pair of black lines in each blue field, so I don't think it can be called a Murray, though it is very close to it.

Aye,
Matt