I have a question about the rarity of a model 1900 shotgun I saw at a gunshow yesterday, it is in 16 guage and has two matching serial numbered barrels both damascus, it also has ejectors (KED by Charles Semmers book) The frame has the letter Q before the serial number. My question is how many model 1900 were made in 16 ga with ejectors? and how rare is the matching second set of barrels? the gun is well used but the bores are good and the price is $700.00

Thanks in advance!