"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.
It is Latin for "Registered trademark". In May of 1948, Smith & Wesson changed their simple "Made In USA" rollmark to a more complex four line bilingual version. This was to combat the many Spanish counterfeit revolvers being produced. For collectors, the 4 line rollmark indicates a definite post war gun. The "Made In USA" mark appeared in May, 1922. Prior to that date, there were no markings placed on that area of the frame by the factory.
45 Smith and Wesson
smith and wesson.
No engineering changes.
Enhanced
Most likley an assembly number.
In this forum's context, Smith and Wesson, Target Sights.
Usually it means "Smith & Wesson"
No engineering changes have been made.
1961
I assume you mean Smith and Wesson. If it is a .22 caliber S&W revolver, yes.
Military and Police