Red leather passport holder with tartan lining

I lost my red leather passport holder yesterday around 3pm outside the V&A Dundee on Dock Street, by Discovery Point. It’s a slim wallet the size of a passport, with a small gold crest on the front and a blue tartan lining you can spot when you flip it open. Inside there’s my passport and a couple of cards, plus a tiny photo of my family—really sentimental stuff, and I’m hoping to have it back before my next trip. There’s a tiny dent in the bottom-right corner from a bag strap, and a bright green zipper pull is attached as a quick marker. If anyone spots it, I’d be so grateful.