I skipped lunches, I pass on the latest STYX album, I saved my money so I could fork out the $400 this rig commanded. And I clearly remember the advertising/reviews stating "E.F. Johnson re-enters the SSB market". Later of course, when the 40 channel rigs came out, E.F.J. offered 2 other models, strangely enough - mobiles as well (Why they didn't market a base station with SSB is beyond me).
So, for all of these years I thought EFJ only produced 2 SSB mobiles in those early years....until just recently. A few weeks ago I was perusing the newest listings on EBAY when I saw an auction for a Johnson 351 SSB mobile. "This had to be a typo" I thought, but when I saw the picture I realized the 351 was truly another 23ch SSB mobile.
Naturally, I had to buy it, and maybe I've had my head in the sand, but I would classify this rig as a rare one. If you've seen these around drop me an e-mail and I'll re-classify it, but I don't think too many of these were manufactured.