I'm too lazy to recreate the post with proper image ordering and select the correct images so ill just dump all photos in a spoiler tab, got an nginx error when submitting the post.
Finally got my Omnikey gold badge from the post, just a week after I decided to quit this hobby. Might as well post info since I got it.
It came with the serial key sticker with the date. Inside the keyboard there is a blue sticker stating "QUALITY CERTIFICATION BY F.E.". There is also a date on the PCB cut, PCB traces, and plastic. This is probably the manufacturing timeline of the keyboard
PCB cut => Feb 4, 1988 (19980204)
PCB traced/assembled => April 27, 1988 (19980427)
Plastic Case moulded => June 13, 1988 (13-6-88)
Keyboard is assembled => June 29, 1988 (06-29-1988)
Serial: 109976 (9976th Omnikey?)
The blue hue of the slider looks more brighter/vibrant than the Leading Edge DC2014 and OEMAX ones that I've seen personally, got 2 blue sliders from the OEMAX board to confirm that the switch seems bluer than it really is. Also the switches are clean, and it's satisfying to type on, but for some reason it's still not as perfect as the DC2014 one (then again the DC2014 board was close to NOS and was barely used).
Image dump:
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