Is yours a Bialetti? Mine's the "4 cup" stainless steel Venus, so I think it's probably like a "3 cup" Moka Express:

https://www.reddit.com/r/mokapot/comments/1p61tgb/how_much_c...

Yes bialetti original. Sounds like the venus is the difference.

Ps Check out moka pot voodoo on YouTube, if you haven't already. I almost never make a bad brew now (except for literally just now, but was with a new bean, roasted darker than usual. Will grind finer next time).