Swan 600-R,the "S" is not with this radio. It has only one filter installed the 2.7 SSB filter. The cabnet needs all six black oxodized screws. Working on all bands 80-10M.
There is one mod on the radio. The previous owner installed a SO-239 connector. The Swan 600-R used a RCA plug for the Antenna connector. The RCA plug is still there. They ran a wire from the end of the SO-239 into the RCA plug. Shipping wt: 31Lbs + Insurance.