Someone shipped them what looked like a mint NOS RU-16 and coils, direct from an ebay seller. They were not especially looking for that set. Funny thing is that the set came up from Miami by a guy driving van. He got there, called, and told them "Your stereo equipment is here." They figured it was a wrong number call at first, but eventually figured out he had those radios and was right outside.
As they pointed out to me, figuring out When in the long history of the aircraft they wanted the radios to reflect was an issue.
Wayne
WB5WSV