Ruger has never made a model with that number. You might be referring to a RG, which was made in Germany. No sn records.
You don't. They were not made to be taken apart.
15-50 USD
25 USD
ROHM
30 or so
Inexpensive. @ 50-60's
http://www.oldguns.net/q&a8_98.htm
Glad to help: The serial number is located on the bottom of the aluminum metal frame of the grip, that is, the very bottom under the grip. Point of interest, the RG-23 six shot .22 caliber revolver, was made in two barrel lengths, 1.75 inch and 3.38 inches. It is a cheap, yet fairly well made revolver, and the parts, and usually the whole gun is/are made by Rohm Gmbh in Sontheim/Brenz, Germany. It can be worth between 50 to 75 US dollars depending upon condition.
20-50 or so
No such model in the Ruger line.
Depending on condition, between $50 and $75. These are alloy framed revolvers of indifferent quality.