I don't suppose there is anyone out there looking for an old English (London) 12 g side by side boxlock made in 1915 by Watson Brothers. Not too many of this maker about unless you have a pile of spare cash in a Swiss bank.
I can provide full details to anyone is seriously interested. I also have a few other old English I could throw in.
Let me know what you have as swap, must be in excellent condition. Ideally after German/Finnish brand.