Zerbey says:

I had this exact monitor, it came with an Amstrad PC-7486 powered by the “mighty” 486SLC-33 (!). After mine blew I received a replacement that had a different brand name but same case and internals, I suspect this monitor was used by several different companies.

It had a reasonably good picture at 800×600, but was interlaced and basically unusable at 1024×768. Also very unreliable, mine broke twice and had to be service before finally being replaced, all within the three year extended warranty period.