Vintage synth say ..
In 1990, the Proteus 2 was released which is identical to the Proteus 1 in most every way except that it has 4 MB of purely orchestral sounds - the same sounds from the Plus Orchestral ROM card, which also happen to come from the EIII library. This was the first time really high quality sounding orchestral sounds could be had in a dedicated sound module.
All in good condition as pictured
Here's the demo sequence on YouTube