'AH' indicates manufacture in 1971.
Blue Book of Gun Values
1964-1965
51 or so
L= 1951
You will have to contact H&R 1871 Inc. to find out.
Serial number
Impossible to answer without the serial number.
50-125
50
After 1940, a LETTER prefix determined the year. IF your first character is a letter S and not a 5, that would be 1956.
The H&R Sportsman pistol with serial number 30547 was likely manufactured in the early 1950s. H&R began producing the Sportsman model in the late 1930s, and serial number records suggest that this specific number falls within that timeframe. For a more precise year, consulting H&R's production records or a dedicated firearm reference source would be necessary.
Sorry- H&A went out of business in 1916, and there are very few production records for the company.