Very nice. Are you a member of the LCSCA Michael? If so, you can find the DOM here
https://lcsca.clubexpress.com/content.aspx?page_id=22&club_id=43784&module_id=246742
and a Research Letter should document to where the gun was originally shipped.

It appears to have the later FE but be aware that the 20g 2 1/2" chambers were not lengthened until about 1936.