This video provides a brief demo of a Siemens E-310 'rainbow' marine communications receiver , c.1960. Refurbishing work included recapping, replacing over 40 resistors, replacing selenium rectifiers with silicon parts, replacing three tubes (the EM34 eye tube has yet to be replaced), cleaning switches and controls, removing the front panel and knobs for cleaning, repairing the slow motion drive engaging mechanism, cleaning, adjusting and re-lubing the dial drive mechanisms, troubleshooting inoperative bands (2 and 4) and a full IF and RF alignment.