Voice-O-Graph Labelography (Part 8)

This is my eighth update to my Voice-O-Graph Labelography project. I have enough information to post just one more variant for the list today. I have found a red-text variant of the Blue on White disc. I have assumed that it too dates to the 1960s. Looking now at those four of very similar design I suspect that the paper labels predate the writable surface discs. Cost saving measures tend to appear in the declining side of a products popularity. Eliminating the label removes a step from the manufacturing process. It's a shame neither of those discs have confirmed dates.

Remaining work needs done in the area of date confirmation and integration of the anachronistic metal-core green label discs. I also do not discount the possibility of more color variants. [Contributions are always welcome if you know more.]

Red Top on Yellow: Unknown, assumed to be first disc1943?

GEM Mutoscope Disc: 1945?

Red on Yellow: 1943, 1944, 1945, 1946, 1947

Red on Beige: 1946, 1948

Red on Unbleached: Unknown 1940s?

Red On Blue: Years 1947

Teal-on-Unbleached : Year: 1948 (assumed)

Blue on Blue: Year: 1948

Black On Red: 1948

Black on Green: Years:1951,1953 - 1955 (also had metal core variant)

ESO Mutoscope Disc: 1950s?

Mutoscope Black Label: (45 rpm) Years????

Black on White (45 rpm) 1957, 1959

Blue on White: Unknown assumed 1960s?

Red on White: Unknown assumed 1960s?

Black on Yellow: Years 1964

Black on Red: Unknown assumed 1964?

Yellow Label Unknown assumed 1950s?