Here's a four screw "no dash" I picked up not too long ago. It appears to have been fired very little if at all...(I know, since leaving the factory). No marks on the recoil shield, the ejector rod is still nicely blued.
What it does have is rust, pitting, and bare metal showing (hit with a cold blue pin for the pictures). It strikes me that maybe it rested in a nightstand, or sock drawer for a long time. I could be totally out to lunch, but it's a good story for me.
The diamond Magna's have been placed in a safe spot, and replaced with a set of Pachmayr Grippers.