Very nice. I have never seen an RA-103 in blonde, assuming that's an original finish rather than a bad strip job. The cabinet looks identical to my RA-103 Meadowbrook, apart from the color. I believe the square dial (rather than round) makes it a RA-103D.
What it's worth depends partly on where you live. I have only found a couple of early DuMonts here in the Pacific NW.
Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html