Posting here because it was a classic shape used by a lot of TF2 players back in the day and some still use it. Some of the original versions (G400 series) had cable issues, and the shape was never refreshed.
This includes a 3360 sensor and looks to have switches separated from the shell.
Photos:
Facebook post:
https://www.facebook.com/nixeus/photos/a.196743813695930/1926283774075250/