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"Hohner HS-1 Digital Sampling Keyboard (White German edition of the CASIO FZ-1 - exactly identical in every way apart from casing)
Detailed information about the model - http://www.vintagesynth.com/casio/fz1.php
This is a very well respected early sampling keyboard with many many editable features, an internal memory for samples and amazingly a floppy disk drive for further storage space.
As mentioned in the linked article the HS-1 is also a very powerful sampler AND synthesiser, with genuine analog filters and the option to create and layer waveforms - even draw them yourself. It also features the usual MIDI IN/OUT/THRU slots and I am told can be used perfectly well as a controller for modern software programmes."