Yesterday at a gun show, I spied a Ruger .44 mag, 3 screw, old model flat top that is in really nice condition. There was absolutely no bluing worn off,all screws were unbuggered, the grips were black hard rubber(?) with the Ruger logo. The usual wear spot on the base pin was missing any peening from recoil, and the hand and ratchet were pristine. Now here come the rub....The complete backstrap and grip frame was not the usual anodized aluminum, but rather a flat black that looked like it may be steel? The serial number is 226XX. which indicates it was mf'd in 1959. Did Ruger ever offer such an option? HELP!