Elegant shoulder bag for work

Hello,

I am looking for quality and elegant shoulder bag for my wife. She is teacher and she need something bigger to carry some A4 papers, 13" laptop, tablet, maybe some book, keys, wallet, 500 ml water bottle.

Because of more valuable items bag should have some kind of closing mechanism which cover top of bag, maybe zipper, of piece of leather to cover it with some clip. Preferred style is black leather with gold accent.

For reference of her taste she very loves design of her smaller shoulder bag Strathberry Multrees Hobo. I checked other Strathberry bags but bigger bags I found usually are top open, with some magnet clip, which is not what I am looking for.

Budget is 1000 EUR.

Any recommendations please? Thank you.