MSC, I have several DeArmonds with that green color, I believe was it called "Teal Transparent" and
agreed - depending on lighting conditions, sure can look like a near-black.
Have wondered if there may have been some variation in either the saturation of the color when
it was applied and / or the natural color of the wood it was sprayed on.
The color of the finish of the S-73 in the center photo was more like an emerald green,
the darker green you've described seems somewhat more common,
as seen in the first and last photos.