Awhile ago, I ran across an ebay listing for a camera, motor drive, and two lenses, all in this curious bag that looks exactly like a Billinham 225. I took a gamble and bought the kit for the total cost of $90.
Since receiving the kit, I've done a bit of digging into what this bag is. It turns out to be a British Correspondent's Bag sold by Banana Republic sometime around 1985. It was made in England exclusively for Banana Republic, but there is no reference as to who made it. I've found some unsubstantiated claims that they were made by Billingham, and a few claims that they were made by Brady Bags of England. Given the design and detailing, I think it more likely to have been made by Billingham.
I've since sold most of what came in the bag, for basically $90, so now I have a free, very well made, and fairly rare Banana Republic British Correspondent's Bag.