Ya know I don't think those were anodized, They were painted or coated with the color. I have a blue D set just like that on my ripper. Those E's were colored the same way. Mine were w 7c Arayas. You could strip and recolor
that ugly duckling mongoose stem I had on my moose goose when I first got it. I traded it out for something lighter and better looking, now I want it back.
I used to have a chain tensioner on it so I could quickly change out the gearing, but it was too much of a pain. I even tried with a derailer years ago but it never really worked right. I just never took the second chainring off
I recently purchased this 1979 PK Ripper on craigslist and had a blast bringing it back to life. Its in the database under "murphsmoose". Oh and that's my Moosegoose. Ive had it since 82'.