IBM mdl M4-1 Space Saver Keyboard TrackPoint. US made by Key Tronic 1997 for IBM | eBay https://www.ebay.com/itm/IBM-mdl-M4-1-Space-Saver-Keyboard-TrackPoint-US-made-by-Key-Tronic-1997-for-IBM-/222669807709
それ、これっぽさがある