The Model XL-25 was built in 1926. You can find a schematic here on nostalgiaair. After schematics click on "Rider by Original Index" A.C.Dayton & model number.
Norm
: I have purchased an A.C.Dayton radio model XL-25. It is a battery powered but have no other information and would like to know the year and if a manual is available or where to contact for information. Thanks