For a while, I've wondered if there's anything specific that differentiates an early ADB KB as a IIgs keyboard.
My IIgs came to me without a board at all, but several months later bought a bunch of ADB peripherals. Included in the bunch were a couple of keyboards with "concave" key caps. They look and feel a lot like the keys on a IIc.
I have one of these boards on my IIgs now. On the bottom, it's marked only "Apple Computer Inc" without giving a model name. The one thing which DOES throw me off on it is that it has a power button(in a similar style to the Apple Keyboard II). Even so, all of the IIgs I can find pictured online seem to have the same keyboard.
Does this sound like a IIgs keyboard? I can provide photos if it would help explain what I'm describing.