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
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
The Young America model was introduced in about 1890 and remained in production until 1942.
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