The M 629-3 Classic DX came with 5 (total, with the one on the revolver) different front-sights:
Red Ramp, Black Ramp, Black Patridge, White Dot Patridge,
Patridge Gold Bead (missing in my pics), all .250 heigh
There was a time, when S&W offered (also in a set) Black Patridge front-sights in...