I have not been able to find where these shotguns originated, but the reason I am replying is due to the fact that my finch arms 12ga. single barrel is also stamped with 200743
No
With the serial number that you provided,your Ithaca double barrel shotgun with the damascus barrels was produced in the year 1900.
Check the barrel and receiver
Try the receiver, barrel, forend
1896
Check the receiver and barrel
look on the breach, barrel.
You may have to break the shotgun down in to the barrel section and the receiver section first.Look under the barrel section on the flat just ahead of the lug for the serial number.
Who made it, what caliber is it, is it a rifle, shotgun or hadgun, how long is the barrel, is the barrel round or octagon, what is the stock made out of, what is the serial number(if any)? Who made it, what caliber is it, is it a rifle, shotgun or hadgun, how long is the barrel, is the barrel round or octagon, what is the stock made out of, what is the serial number(if any)?
next to the barrel
Check the frame and barrel
Look on the receiver and barrel.