Fox Collectors

We came home this day with a 1929 Yr. 20 Ga. Ejector Sterlingworth, the chokes are .034 aned .039. This looks like a lot of choke for a 20 Ga. We measured them twice with two different measurment tools to make sure of the numbers. My question is how common is this type of choking on a 28 inch 20 Ga.Sterlingworth ???? The gun is a good honest gun, but has a home made forend wood. Any one know where I can find the forend wood???

The most choke I have in a 20-gauge Fox barrel is .032" in a 1927-vintage 20-gauge A-Grade that letters as full in that barrel. The right barrel has.027" and letters modified. I have a 1930-vintage 20-gauge Grade 4E Ithaca NID that has n.623" bores and chokes .042" left and .038" right. It has no choke markings on its barrel flats.