I have two of those. One is in an absolutely perfect condition and in a working amiga 500 (upgraded to an 8a mobo). The other one is a german keyboard that I used for parts mostly - it is missing some keys and springs unfortunately.
Those are pretty rare and I believe they are made by chery (really old ones) and samsung unlike the mitsumi ones in newer amigas. The keys also have a slightly different shape they are not rounded like the mitsumi ones. They are also a major pain to reassemble but in general they seem better quality than the latest ones.
