Exact year cannot be determined from data given. 583.91 is not a serial number, but a Sears model number.
sears roebuck and company
It is the same as a Marlin model 81
Hi Standard made the Model 20 J.C. Higgins for Sears
made by Marlin, their model 122.
This is the code number for a "Crosman" model 180 air rifle. Both Crosman and Daisy made air Rifles for Sears under the JC Higgins name.
what year was jc Higgins sears and roebuck model 20 12 gauge 583.60 made
the model 126.19310 is a Crosman model 180 made 1962-1965 for Sears under the JC Higgins name.
The JC Higgins Model 45 is simply the Marlin Model 336C as made for Sears. The base gun is still in production, although Sears is no longer in the gun business. www.countrygunsmith.net
I could be wrong, but I believe it was Sears/Roebuck.
The J C Higgins model 20 pump shotgun 583 55 was actually made by Sears. Sears and Roebuck & co. owned High Standard and held all the licenses for this gun .583 means House brand exclusive Sears product. 55 is the Sears code for the year 1948
High Standard. http://www.histandard.info/PDF/Sears%20Shotguns.pdf
1945 Made by H&R for High Standard / Sears & roebuck