Red (Rashi?) Teffilin case?

Hi all! Long story short, I’m wondering what the significance of this red teffilin case is. (The shel rosh is the same). The only other time I’ve seen a set like this was in Warsaw, where everyone in the minyan had them, but I wasn’t able to stick around to ask. Just curious if it’s connected to a specific group or something! TIA and Shavua tov.