This lady's coat caught my eye today (mostly because I was amazed she wasn't roasting in it!) but I was thinking that it looked a useful coat for autumn or early spring - it was only lightly padded so not bulky, and had a metal fastener and button arrangement with the elastic at the back that gave it shape without looking tied in the middle like some of my elasticated-waist walking jackets.
There's a good chance it won't be from this season, and it's probably too generic for anyone to recognise specifically, but you never know.