10-50 USD or so
50
The gun is likely a Harrington & Richardson (H&R) model 925. The caliber is .38 Smith and Wesson (S&W) special, not to be confused with .38 special (SPL). You must shoot the .38 S&W ammo, not .38 spl.
H&R model 949 was produced from 1960 to 1985.
H&R
The Young America model was introduced in about 1890 and remained in production until 1942.
No such caliber in that Model Number. Also, the serial number does not conform to the S&W convention. You might have an H&R Model 925
No such model number.
H&R made it
Your H R model 923 with a prefix of N indicates that it was made in the year 1953.
Value of any gun is based on make, model, and condition. There were dozens of different models of the H&R top break revolvers in .38 S&W- could be $50 or $250.
@ 1890