44 Special
ctg is short for 'cartridge' as in 357 cartridge.
Any .357 Magnum revolver (this does not apply to automatics or any other type of firearm) can fire .357 Magnum and .38 Special cartridges.
Yes
Depends on how old the revolver is.
Cartridge
Revolver made by D Wesson chambered for 357 Magnum
DA revolvers have been and are chambered in 357 magnum as have SA revolvers
1961-62
CTG stands for Cartridge
Model 15
47