It has a 4" barrel and I am sure it is quite old as the Smith & Wesson trade mark emblem on the right side of the gun is nearly worn off. It belonged to an ex police officer volunteer in the Sacramento, Ca area.
To find out what year it was made and any history on the revolver, you can request a search directly from Smith and Wesson. They don't charge for telling you the year it was made, but to do a weapon history search will cost you $30:
http://rds.yahoo.com/_ylt=A0geu5o0vK9HsyMAmMRXNyoA;_ylu=X3oDMTE4MTk5MTM5BHNlYwNzcgRwb3MDMQRjb2xvA2FjMgR2dGlkA0NTMDFfODcEbANXUzE-/SIG=1521caaua/EXP=1202785716/**http%3a//www.smith-wesson.com/webapp/wcs/stores/servlet/CustomContentDisplay%3fstoreId=10001%26catalogId=11101%26content=25301%26sectionId=10504
They'll give you a ballpark figure of what the gun is worth.
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