Voice-O-Graph Labelography (Part 4)

This is my fourth update to my Voice-O-Graph Labelography project. This time I have added a Red-On-Blue variant of their late 1940s label. I's very similar to the Red-on-Beige and the Red-on-Yellow labels. While the dates are more-or-less consecutive they also date to a very tight range. I suspect that they were manufactured concurrently and not consecutively.
Red on Yellow: 1943 - 1947
Red on Beige: 1946 - 1948
Red on Blue: 1947

I thought I was down to one more type, but it turns out there are at least two more types which I am still documenting including one that probably date to the early 60s. 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

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)

Yellow on Yellow: Years 1964

Red On Blue: Years 1947