Thank you!
It's my own pattern. I've certainly been inspired by similar bags and I'm sure I'm not the first person to make a bag this way but there was no pattern, nor did I copy anything I'd seen directly. I used to make similar bags out of 2 big pieces but recently I've started doing them out of the 5 pieces and I'm much happier. While it does require more sewing I really enjoy the way the seams frame the sides and give the bag a little shape, as well it's a lot more efficient for leather usage vs just 2 big pieces.
I have another one ordered from a client that I'll be starting in about 2-3 weeks so I'll try to snag some pics and video and perhaps do a quick how-to if anyone wanted to see it.
Thanks for the kind words.
I'm not sure exactly where it comes from but it's a distressed brown oil tan. It marks very easily, and the marks rub out with use so it's perfect for bag that's going to get marked up anyway through use. My supplier carries it in stock in two colours, this and a toffee colour, so it's super convenient. It's about a 4oz, very soft.