I found a like new S&W M10-5 today at a local shop. Its beautiful. Its got the standard barrel and a wide hammer. Does anyone know how common these were built with the wide hammer? I'm not sure whether or not I've seen one before like that. I probably have and didn't notice, but any info would be appreciated. I love the M10 and have a like new 10-6 with a heavy barrel. I wouldn't mind picking up this one to go with it. I'm thinking its 1960's production. Thanks for any help. I'm far from a vintage Smith revolver expert.