From theresearch I’ve done the 171-6833C motherboard was the earliest functional Saturnmotherboard that I know of, and it’s found inside the Sophia development box. Icouldn’t find, however, what other boards were inside the different developmentboxes - target box, sound box, etc, to name a few. In contrast theearliest retail motherboard version was 171-6874D found inside the Japaneselaunch Sat