Hi-Tek/NMB PCB rubber dome keyboards

Hi-Tek and NMB are not known for making rubber dome over PCB keyboards. In fact, no confirmed keyboard exists. However, there is a Sharp x68000 keyboard, model DSETK0024CE00, that appears to such a keyboard. additional photos show a Hi-Tek/NMB-like label affixed to the PCB, but there is no complete set of high-resolution photos of this keyboard anywhere. DSETK0025CE01 also appears to be a Hi-Tek/NMB model, but this appears to be membrane-based.