Voice-O-Graph Labelography (Part 2)

This is my first update to my Voice-O-Graph Labelography project. I've added a single early label at the bottom. It spins at 78 rpm, and has a metal base which indicates to me an early WWII vintage. metals (among other materials) were rationed in manufacture in WWII and I expect their move to the card stock base around 1942. WWII ran (for America) from 1939 to 1945 so I estimate these more rare "red tops" to date to 1943 or earlier. The first advertisements for Voice-O-Graph date to 1943, but there were almost certainly some produced earlier. The company name is printed as "International Mutoscope Reel Co." On all other discs it is just "International Mutoscope."  The word "reel" was dropped form their name (so far as I can tell) in the 1942 as in the ad above from that year.

I have also found two more types which I am still documenting including one that appears to date from the late 60s, probably the last model they made. This list is not complete, and continues to grow. Hopefully this can serve as a bit of a labelography for future use. Below I describe, label, and date each type of Mutoscope made disc as fully as possible with all dates I've encountered. I will continue to update this post so it may be used for reference.

Black on Green: Years:1951, 1955

Blue on Blue: Year: 1948

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

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Black On Red: 1948

Red on Beige: 1946, 1948

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

Black on White (45 rpm) 1957, 1959

GEM Mutoscope Disc:Years: 1945?

Empire State Observations Mutoscope Disc: Partial post mark to 1953? Last digit unclear.  Patent Number 2600573 dates to 1946.

Red Top on Yellow: Years (unknown)