Re: "liquid crystal driver" sighting
Don't be surprised if this turns out to be Tek-made - you may be able to tell by the boards, parts, and construction techniques. Tek did work with LCDs in the late 1980s to early 1990s. The well known ones are the color-shutter, used with CRTs in various products, and the plasma-addressed liquid crystal (PALC) technology. So, it's possible that this setup was used for in-house R&D.
The color-shutter is what gives many of the TDS scopes their multi-color display capability. For those who never heard of PALC, here's a very succinct description: