Stevens Model 335 Production Dates ?

I've been doing some additional research and it seems like the Stevens Model 335 Double Barrel Shotgun was started in 1910 and ended in 1929. To be more specific it seems like the Year Production for guns labeled "J. Stevens Arms and Tool" was 1910 to 1915.

Now I've read 2 different stories on Years Produced when they changed the name to just "J. Stevens Arms". One is the more familiar one of 1916 to 1929 and another source stated "No Production from 1915 to 1920" (war time area) and they were actually Produced from 1920 to 1929.

Looking for more info and opinions about the possiblity of None of them being available between 1915 and 1920.

Thanks

Bill