03A3
No, the Savage Model 19 NRA has a unique bolt and there is no other rifle with a compatible bolt.
The Marlin Model Golden 39A is the oldest and longest continuously produced shoulder firearm (rifle) in the world.
Daisy made a model Golden Eagle BB rifle but it was a model 104 golden Eagle from 1966-1974. Daisy made a model 88 Hunter rifle, roughly from 1957 - 1960 Daisy made a model 98 Daisy Eagle in three variations from 1955 -1960. (I think this is the rifle you are referring to.)
Assuming you have a Golden State Arms Santa Fe Model 1944 rifle here. Golden State Arms didn't manufacture rifles - they bought surplus military rifles, and sporterised them. What you have is PROBABLY a surplus Short Magazine Lee Enfield rifle, and would be chambered for the 7.7x56R cartridge, also known as the .303 British. However, if you're not certain about the calibre, then you need to take it to a gunsmith to have them measure out the chamber - not all of the Santa Fe rifles retained their original .303 cartridge, and, although less common, rifles converted to .308 Winchester and .45-70 are not unheard of.
50-250 uSD
Marlin Model Golden 39A
Depends on who made it and what grade it is.
Your western Field model 766 was made for Montgomery Wards by the firm Mossberg and Sons.The Mossberg model 810B is the same rifle as the one you own.
It it is not marked, you will have to have a chamber cast taken.
It's a warning to the user that the only compatible ammunition for that rifle is the .22 Winchester Magnum Rimfire (22 WMRF), and other types of .22 ammunition are NOT compatible.
Marlin made a Golden 39A .22 lever rifle from 1954 to 1963 (serial prefix L through W). The Marlin model 50 was a semi-auto 12 ga. shotgun. If you have a .22 rifle marked "Golden 50," it isn't a Marlin. I have a Golden 50 Glenfield Mod. 65 from the Marlin Firearms company built in 1970.
Here is a list of Daisy that have the Eagle name in it. Model 98 Daisy Eagle made 1955-60 Model 98 Golden Eagle 1957 Model104 Golden Eagle 1966-74 Model 1776 Golden Eagle 1968-72 Model 50 Golden Eagle 1936-40 Which one is yours?