From your FAQ in section:
How can I translate/check my serial number - What does each part mean?
Nissan Skyline - FC Pro Badged Version (YYMM build style serial #)
See notes below for FC Pro:
Another oddity we noticed is that all the 1996 built Skyline RB26 models (414-N001) I've seen so far have a FCPro sticker but a regular firmware version. This conincides with what we have seen in the wild, where a number of PowerFC Pro users, report they have standard PowerFC unit - but its badged as a Pro version. So if you buying an FC Pro version to suit Skyline RB26 - Make sure it doesn't have serial # -> 96??-???? as its probably a normal version
However the silver sticker text: FC-Pro対応 which means FC-Pro compatible which means exactly
that the PFC is compatible with the tuning software FC-Pro and it never implies that the PFC is actually a Pro version, its a coincident of overusing the Pro word for marketing by Japanese too many times just to sell it better and for more.