It probably is.
Looking for militaria from 38. Batterie, Heeres Küsten Artillerie Regiment 977, also from 31, 32 and 36. Batterie.
Oh yeah, those are crap- they're not even decent fakes LOL
Never trust sans-serif fonts on discs that're desirable field units- each of those alone is cause for concern, but togther they're 99.9% likely bad. In this case it's 100% I'm certain. That type of really narrow tall lettering is common on fakes- I wouldn't be surprised if one checked known fakes, there'd be a match someplace. Plus the lack of wear on the Panzer disc is just ridiculous- being such a low serial number field unit disc, it'd have had to be pre-war issue so shoud have a lot of wear but there's nothing. The HG is just silly- the single most faked unit ever (and the single most overrated unit historically as well LOL).
Ohhhhh- pillage then burn...