Just back from service @Mitka so clearly has to go straight on the wrist. Even if that means 2 x WRUW in one day...
It's a Hirsch Camelgrain from the nice guys at Blackbough: https://www.blackbough.co.uk/product/hirsch-camelgrain-lightly-textured-wristwatch-strap/ I think I got it as it was one of the only ones in 19mm, but actually I really like it. Ended up getting a couple of the same style in black and in dark brown. Really comfortable.
Good Afternoon... bought this 30 years ago so I better wear it.....the free batteries for life still stands Today.........