Scott #492 Lake? Likely Not.

It was good that other stamps were included in the original image posted. However, that is "half" the job. The other half is to take as good a close-up* of the densest ink portion of ALL the stamps too and post them side-by-side. You can see a lot of color "change" just by looking up close.

(*not talking about lab equipment level, just one of the higher dpi settings like 1200dpi in ball park of what good magnifier (e.g., 6X to 10X) showed when you used one. To put it plainly, I've seen set of stamps like shown that when I examined up close, their colors appeared closely equal; e.g., carmine. Close-up viewing is a simple but important step to weed out most "simple" cases not needing expensive expertising.)

Well, I spoke too soon. I hadn't drilled down on original image to see if it would expand better, and lo' and behold, the first two coils' colors look 90 percent on way to matching. I bet at closer look they appear identical. Looks like (pun intended) my prior point is demonstrated.