And the Galoway tartan was not designed until the 1930s, either. I'd say a Watson in the early 1900s would be more likely to wear the Buchanan, possibly Forbes.

Remember also that at that time there were no such thing as 'ancient' or 'weathered' colors. What would have been worn would have been the standard tartan colors, which we today call 'modern.'

Aye,
Matt