80111 in-house?

Saw some older threads suggesting it might be built by eta. Can anybody shed some light on this?

Here the IWC answer:

"
Firstly thank you very much for your interest in our products.

The caliber 80110/11 was developed by IWC Schaffhausen and the movement is fully assembled and adjusted in our workshop in Schaffhausen. It is correct that due to capacity reasons, components are manufactured by ETA according to IWC specifications or are purchased as standard parts.

Yours faithfully distinguished

IWC Schaffhausen

Branch of Richemont International S.A.
Baumgartenstrasse 15
CH-8201 Schaffhausen

"