I believe that both of these fine revolvers are the best examples of the firearms industry top service revolvers of the Golden Age of police service arms which, roughly, run from the post-WW II era to the middle 1980'.
Both represent the two calibers that were in service and basically allowed for municipalities, states, and county law enforcement during the years mentioned. They are fabulous examples of the manufacturers art. They are light enough to be carried every day comfortably, yet strong enough to be used for serious law enforcement business.
Your two are simply marvelous and I'm sure that you are happy and proud to own such a pair of the art of manufacture of two of the finest examples of the most reliable and serviceable of police (and civilian) revolvers.