-
Hamilton Khaki Field Auto 38mm would be a decent choice, and significantly under the £1k (you can pick them up around £375). They are pretty versatile - can be dressed up or down, most straps work. The 38mm size wears quite large so works on variety of wrist sizes, so perhaps lower risk if a present and the husband doesn't get to try it on first.
-
Quite a few Longines come in around that price point, many with display backs. Eg:
https://www.longines.com/en-gb/watch-presence-l4-921-4-72-2
Depending on the style you want they do sportier models as well.
Not sure I 100% wholeheartedly recommend Longines as I have two friends who’ve had problems with theirs (one had the bracelet break on his Conquest, another had the lume fall off the dial on his heritage model, I forget the name) but both were dealt with under warranty.
A Junghans Max Bill automatic would also be a very tasteful choice in that price bracket.
Also you can just about get into Nomos for a grand, which is some pretty nice watchmaking for the money (though this model is manual, and no display back):
https://www.jurawatches.co.uk/products/nomos-glashutte-club-watch-701-nms-001
Farer worth considering as well on the more casual/colourful side of things.
-
One of the Helson pilot watches. They look like really good value ($499 and they've got 15% off at the moment), I was pondering one myself.
Also comes with white dial and a few other styles (although a couple are out of stock).
https://www.helsonwatches.com/shop.php#!/Helson-Metropolis-Black/p/96689869/category=26645472
Recommendations sought - this is a gift for a friend to buy for her husband .. specifications are Automatic, on leather strap, not too fancy but a display caseback if possible, new.
Sub £1000 -
My initial thoughts were Hamilton khaki but I have no idea all the different models.