Short story: Apparently two different schematics were issued for Colors (Williams, 1954). One for a machine featuring the Star Feature and one without this feature.
Long story: I ordered a schematic from The Pinball Resource when I first began working on Colors. When it arrived, I was curious about the circuits associated with the Star Feature and so began to look for them on the schematic. These included circuits for coils and switches associated with the "Star Unit" stepper, the "0-9 Unit" stepper , a "Numbers" relay, a "Match" relay, a "Special" relay, a "2nd Coin" relay, and a "2nd Coin Trip" relay that were each clearly labeled as such in the machine. But to no avail, I couldn't find these items on the schematic, nor could I find circuits associated with the various lites associated with the Star Feature. But other relays that appear to be uniquely associated with Color were apparent and so it least seemed partially correct. The schematic I received indicates a date of June 17, 1954 and says, "WILLIAMS COLORS 6-17-54 ORB REVISED 8-5-54 AM[?] REVISED 3-20-54 WLP" as shown below.
I called Steve and asked if by chance he has or is aware of different versions of the Colors schematic and if I understood correctly, he said that the schematic he has came with archive materials from Williams and that it was the only schematic for Colors that he is aware of. He also mentioned that he had distributed a couple of copies of the Colors schematic in the past and never heard any issues about the schematic not being accurate for the machine.
During this time I was also chatting with another Colors owner (novaguy) and asked him if his original schematic for Colors had Star Feature circuits on it and whether or not it indicated the same date and info as the schematic I received from Steve. He said it didn't indicate "revised" on it and otherwise appeared complete. As seen below, this schematic is very different than the one I have which appears to be for a version of Colors that didn't include the Star Feature (which I assume was never produced). Here's the title from the Colors schematic that includes circuits for the Star Feature (with "STAR" indicated).IMG_3199 (resized).JPG
Here are images of the circuits leading to the transformer from the "non-Star version" (top) and "Star version" (bottom) schematics. The circuits are the same, but there are differences in drafting styles. [My Colors though doesn't have a service outlet as indicated on both schematics nor can I see a spot where a service outlet was installed and then later removed.]
Below too are snippets of the circuits for lites from the non-Star version (top) and Star version (bottom) schematics. Notice how the Star version includes a circuit for the 2nd Coin lite (which lites up on apron after the first coin is dropped) while the non-Star version does not. The remainder of the Star version schematic appears to also include the rest of the associated circuits for the Star Feature (not shown).
According to Clay's info on Williams woodrails (http://www.pinrepair.com/wmswood/), Cue-Tee (7/54) is identical to Star Pool (7/54) except for the inclusion of the Star Feature on Star Pool. Colors was the second machine with the Star Feature and so perhaps Williams originally planned for Colors to not include this feature or they were going to release two different versions of the machine.