Can you identify this Scottish regimental uniform

[Tobus]

You may also be able to help pin him down by the medals/campaign ribbons he's wearing. I'm no expert, but you can look here for some help:
https://www.identifymedals.com/medal...itain-pre-ww1/

It looks to me like he's wearing the King's South Africa medal (though with the orange/white/green ribbon colours displayed backwards), which would indicate he was involved in the Second Boer War in 1902. That would make the painting at least from the early 1900s or later. But that's assuming I've identified the medal properly, which I don't guarantee.

I can't tell what the other one is. But it has several bars on it which would indicate he was involved in that campaign for a while. Perhaps a slight artist's misrepresentation of the Queen's South Africa medal? That might make sense, as it was from the Boer War 1899-1902, assuming he was there the whole time in his early twenties.