I have acquired a 659 that for all intents and purposes is a 5906. I'm certain it has a 3rd Gen Frame even though it's marked 659. The stocks are one piece unlike the normal 659. The slide has no barrel bushing, the sights are dove tailed fixed front and rear. The safety/hammer drop on the right side of the slide is secured with a Philips head screw. It does have half-cock unlike the other 5906's I've handled. Is this a transitional model?
