Which owl is the source of Arima's quinque? Considering the confusion between the 2 owls (Yoshimura vs Eto) do we know which one Arima took this quinque from? Has he fought both? I'm not sure if a Tokyo Ghoul: re tag is worthwhile.
The Quinque you showed was taken from the body of Yoshimura.

Source : http://tokyoghoul.wikia.com/wiki/Owl_(Quinque)