A new Windows Phone with a 5-inch display is currently being developed, at least according to leaked photos from a Chinese factory and published by the site IThome.

The photos appear to show hardware test samples of new displays being developed for a forthcoming Windows Phone. During this process, companies usually experiment with different variations and test the quality of the factory producing the part.

It is not clear if the displays, which clearly reveal a Windows logo for the Start key, are destined for a Microsoft Lumia or if these are for some other manufacturer.