My grandad, born 1921 and died 1995 worked at a foundary and went to work in moleskine trousers and wore some form of thick apron, all spark proof I suppose as he worked near a furnace.
When not working / after retired it was always suit and tie, even to go and get his morning paper.
If he was working in the garden he would take off his suit top and tie and hang them on a peg on the inside of his shed door, then roll up his shirt sleeves and get to work. Even then he looked smart.
What always surprised me about him though was the length of his hair. He used to brylcream it back with a comb (he had a decent head of hair) every morning. When it was wet though I would say his fringe came down to the bottom of his nose, but always neatly clipped around the back / slides..always looked smart and in place.
Always popular with the ladies my old grandad was lol