tm711, Please pardon my misidentification. It just goes to show you that, even with pictures you can't see all. The 3 digit number with no other markings should of been a clue that it could be Chinese. It appears it was well made and as I recall the Taku arsenal copies where one of the better Chinese copies. Other than that I cannot be very helpful. Chinese copies are a study by themselves and I have not taken that class.
Regards,