I’m not sure about either of those (not ruling it out though). I have another 2 that are identical. And then there is this one other reference for Staedtler using ‘Hi-Tec’ nomer: Riddle - What kind of pencils are these? [SOLVED] - #8 by majkycz_y
Apparently there is a silver ballpoint series: https://www.reddit.com/r/pens/comments/1qyq68q/talk_to_me_more_about_staedtler_425_25f9_silver/ but I don’t know when or where those were released. They take a standard G2 refill. But the one I posted above came with a different type of fill.
Edit: Looks like there were some more ‘limited’ ballpoint releases, like these:
I guess that would make the one I posted the ‘midnight blue’ variant.
