I have purchased this border engraved double hammer underlever with "Treacher & Co." on the lock and would like to find out more about it. It has Alex Henry barrels. On one of the barrels it is marked "Bombay" with a serial #10xx. It appears to be of high quality and is in fine condition. Any info and help would be greatly appreciated. And this forum has really helped me learn much about double rifles, it is great. Thanks, Sam.