Seen on eBay, a prototype (EVT) motherboard for a Power Mac 7500.
The codename is TNT (The New Tesseract), and the reference number is 820-0991-A. The motherboard is marked EVT, there is a chip connected to several straps (wires added later), and it lacks a ROM, making booting impossible: it is not sold with a ROM module, and the chips are missing from the board (unlike the final version).
An A/V card is also visible, featuring various ports: RCA inputs and outputs for audio, a composite video port, an S-Video port (mini DIN 4), a mini DIN 7 port (likely S-Video with power), and another unidentified port. It was listed for $300 at the time of writing.
Some straps
No ROM
The A/V card
