Apple IIe + RGB card + cable + RGB TTL adapter + CGA monitor = mostly works (controls are completely stuck, image is wobbly). So this Samsung CK4644 CGA monitor needs a bit of love (and cleaning) but otherwise is doing okay.
By the way, if this monitor looks familiar I'll be posting additional pics of it and of a Tandy CM-5 25-1043 (the later model of the CM-5). The cases seem to me to have been made from the same injection mold.
Behind it is a Gateway VGA monitor connected to the same Apple IIe via an a2Vidga card. Colors are different and behavior is not identical but close.
