Folsom Arms & Iver Johnson Shotgun Identification & History

Question
i have a folsom arms 12ga. dbl bl serail#203739 im trying to find out what year it was made an by the way i also have a 16ga. Iver Johnson

Answer
Hello Robert.
  I will be glad to research these for you, but I need more information. I need everything written on them, including full company names and patent dates, if written on top of the barrels or side of the barrels, on the frame, butt-plate and on the water table which is the flat part under the barrels. I also need the length of barrels measuring from muzzle to breech while barrels are open.
  This may seem like a lot, but I do not want to give you the answer some give. "It was made in XXXX" I may spend several hours researching, to answer you question satisfactorily.
  Charles Gage