This is interesting

https://www.ebay.com/itm/Pristine-WW...p2056016.l4276

The sporran is clearly marked 10th Seaforths on the back.

It's curious because Seaforths sporrans usually have a metal rim and metal cones. This has an all-leather rim and leather cones like Cameron Highlanders sporrans.

Then there's a Sutherland/Black Watch tartan kilt, and two Argylls badges.

I need to look into that Battalion and see if I can find photos.