When was your Iver Johnson Champion 16 Ga GCBC made?

There were 3 different models of the champion shotgun in 16 gauge that were produced.The Iver Johnson champion top snap model was made from 1905-1908.The champion model 36 was made from 1909-1922.The champion single barrel was made from 1923-1978.If your shotgun has a serial number and a prefix letter before the serial number,we should be able to identify the year of production.Please include this in your description to help better identify the year of production.