This is an RR-4D. This particular exmaple suffers from the same issue most pre 1976 Radaranges suffer from - the paint around the dials and push buttons flakes away from fingers and finger nails. Out of all the pre-digital RR's, the 4D certainly is the most common.
If I were someone in the Twin Cities *(hint hint), I'd offer the seller a few Andrew Jacksons to take it off their hands, and use a mint-ier panel from a broken machine.
JUST SAYIN'!
Ben[this post was last edited: 4/5/2012-09:26]