The cylinder and light mod chokes would be very uncommon in an original gun. It's quite possible the barrels have been cut back to eliminate some of the choke, or the chokes could have been opened up. If the barrels were cut, even slightly, that tends to lower values considerably. If the original barrels have had the chokes opened, well, that's not so bad, if those chokes suit your style of shooting. Check that carefully. This retailer could have bought guns from any gunmaker he wanted to and have had his store name and address engraved on them, very commonly done. Still need more info to identify the gun before it can be valued. You could have found either trash or treassure.