I have one that looks identical except it has a black plastic handle, it's a 14-S-7069. All the sets that used the stitched leatherette handle seem to have lost it over the years. I have the 7070-G with a missing handle.
On RCA's the last digit usually stands for the color, 0 is Red, 4 White, 1 is black or grey I think and the two tones blues must be 9?
I think the first digit after the S is also the model year, i.e.1957.
Phil's Site has a full explanation of the model number scheme.
http://www.antiqueradio.org/rca09.htm