This is a tough one, appearently Aya shotguns below serial number 600,000 were made by Diram S.A., which was a conglormerate of diff. firearms manuf. put togeather by the Spanish gov. in an attempt to get them more competitive in the world market. It was not very successful. Many of these firearms were imported and sold by American Arms who, I believe, is no longer in the import business. Diarm S.A. is still in the firearms business, I think, but makes firearms under their own name only. Best quess for AYA s/n 398533 is sometime in the late 1980's
with the serial number that you provided,your Winchester model 12 shotgun was produced in the year 1935.
With the serial number that you provided,your Winchester model 1912 pump action shotgun was produced in the year 1950.
With the serial number that you provided,your Winchester model 12 pump action shotgun was produced in the year 1928.
With the serial number that you have provided,your Winchester model 12 pump action shotgun was produced in the year 1955.
With the serial number that you provided,your Winchester model 12 pump action shotgun was produced in 1942.It was one of 50,871 made that year.
It sounds as if you have a Ithaca Crass model shotgun,that was produced in the year 1903 by your serial number.
Your serial number indicates that your Winchester model 12 shotgun was made in the year 1914.
With the serial number that you provided,your Winchester model 1912 pump action shotgun was produced in the year 1955.
With the serial number that you have provided,your Winchester model 12 pump action shotgun was made in the year 1947.
with the serial number that you have provided,your Winchester model 12 pump action shotgun was made in the year 1916.
With the serial number that you provided,your Winchester model 1912 pump action shotgun was made in the year 1928.
Your winchester model 12 shotgun was produced by winchester in 1947.