I'm not too good on models and such but until a little while ago I owned an Epiphone (Kalamazoo) long neck, open back that was made some time in the 60's. It had been sitting in a warehouse in Melbourne for a number of years before I bought it circa 1970. It's the most stable instrument I've ever owned, with an incredibly slick action. While the experts may disagree I can't tell the difference between it and the known population of 3 Gibson long-necks in Australia. I have never seen another Epiphone of its type in this country, but I don't travel in banjo circles much these days. (I swapped it for a Lowden cedar top guitar - a decision that I've never regretted. An old friend still has the banjo). Regards, John