Prefix "T" ran from 1974 to 1978. I'd guess 1975 on this one. They were good guns, but there have been a lot of them made, and value is dependent on the condition and the buyer's desire for the gun. There was a 3" Magnum model available form the 1950s on.
I'd look at comparable guns on GunBroker. Figure face to face is worth $50 to $75 because there is no postage, FFL fee, or doubt as to condition. Just for a point of reference I got a cherry 1976 Magnum version for $245 delivered 19 months ago.
Oh, by the way, with that 'M' on the end of the serial number, that gun left the factory as a Magnum model, and it should say so on it, but you would need a 3" barrel to take advantage of that fact. The receivers were the same anyway, just the ejector and ejector spring were supposed to be different.
What could have happened... did.
Last edited by Virginian; 04-24-2010 at 07:04 PM.