At a quick glance this man looks like a farmer or countryman, but a second look shows the detail of the tailoring; the cuff buttons, wide lapels and the cut of the jacket show that he is a fashion victim rather than a man at a shooting party. Nice style.
Unless he meant it to be that way, which I would find restrictive and uncomfortable, I think the jacket looks too small and the waistcoat too tight. Otherwise the combinations of colours and mix of patterns is beautiful and classic.
I’m sure I’ve seen the same man, wearing the same suit, but with a burgundy cardigan instead of the odd jacket. Which, is exactly what I would do if I had such great pieces, but no matching suit jacket.