Over all it is far easier to find a high quality pre war WWI double than a between the wars or after WWII. I know a lot of junk was made as well but there just are very few high quality guns made at all after this. Most double makers were closed or making other guns. The trained labor pool died in the wars or just got old and retired. Fewer follow on apprenticed labor came along. And shooting declined as a major part time as interest changed. The entire industry declined. Throw in a world wide depression that lasted more than a decade and the end of an era just happened