The Ranger name was used by Sears Roebuck in the 1940's and 50's. I don't show your exact model number in my cross-reference lists, but 103.x was marked on their firearms made by Marlin.
According to Brophy in his Book on Marlin Firearms, Sears used the Ranger name prior to WWII on the gun that Marlin sold as the Model 90 o/u shotgun starting in 1937. After WWII Sears used the JC Higgins name on the gun.
That is impossible to determine without knowing the manufacturer and model of the shotgun.
Answer"Ranger" as a name brand for a side by side 12 ga shotgun is not recognizable. Can you provide the actual manufacturer? Ranger is a name used by Savage at one time.
If you can send a digital picture of the gun we can properly identify it. firstname.lastname@example.org
what is the age of a browning ranger repeating 12 ga shotgun serial number 45579 b
sometime between 1900 and 1945
Can't answer without knowing if it is a rifle or shotgun.
Stevens made for Sears Roebuck
That is not the model number, but the Ranger marked shotguns were sold by Sears before WW2.
The Sears Ranger 105-20 16 gauge shotgun came out in the 1930s. The Sears Ranger shotgun has a 26-inch barrel.