I’ve been collecting Hot Wheels for a while and I’m familiar with their variations: models that are essentially the same except for some details like color, wheel type, or card. A few years ago, I was surprised to see Tomica scale models start having their own variations: one version would be a “regular color” version, and another would be a “limited color” version. The Japanese text that I’ve seen for the latter is 初回特別カラー (roughly translated by Google Translate as “initial special color”) and 初回特別仕様 (“initial special specification”). Shown below are a few pairs of models in “regular color” and in “limited color.”
Stack Exchange Winter Bash 2018 ends tomorrow. I was able to get 11 hats.