The four bolt 4942-1 Rail Consolette along with the 4820 Diamond Plate on the TT of your kit were only used from 1971-1976. That should help provide a date range for it's production. This is also within the time frame during which the COS hoops are believed to have been used, along with the standard wood hoops. Relying solely on Gretsch catalogs for definitive proof of almost anything is always a gray area. Looks to me that all your kit needs is some Black Nitron wrap in the hoop inlays and you'll have an excellent original example.