Welcome to the Forum.

Your "new" revolver is a .38 Military & Police, not a Model 10. Model numbers weren't assigned until 1957 and model stamped handguns didn't actually appear until 1958.

You will see posts that refer to revolvers as a "pre Model 10, 29, etc." These are the same as the model stamped revolvers. The pre WW II guns had the long action. In 1948, S&W introduced the short action in the Military & Police line. These short actions are the same as the model stamped guns and can be called "pre models".

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