No engineering changes have been made.
possibly the serial number....
I assume you mean Smith and Wesson. If it is a .22 caliber S&W revolver, yes.
ctg = cartridge
CTGE on a Smith & Wesson (S&W) double action revolver refers to "Cartridge." It indicates the specific type of ammunition the revolver is designed to use. This marking is part of the revolver's model designation, helping users identify the correct cartridge size for optimal performance and safety.
The Smith & Wesson 64-3 refers to a specific model of revolver produced by the American firearms manufacturer Smith & Wesson. The "64" indicates that it is part of the Model 64 series, which is a stainless steel, double-action revolver primarily chambered for .38 Special cartridges. The "-3" denotes the third major variation or revision of this model, which includes specific design features and improvements made during its production run. The Model 64 was primarily used by law enforcement agencies and is known for its reliability and accuracy.
45 Smith and Wesson
smith and wesson.
"Marcas Registradas" translates to "Registered Trademarks" in Spanish. On a Smith and Wesson .38 revolver, it indicates that the brand and certain product names are legally protected trademarks. This label is often included for international markets or to signify the company's commitment to its brand identity and intellectual property rights.
No engineering changes.
Enhanced
Most likley an assembly number.