This was a style that different brands used in the past and this watch you share is showing quite well that there are dials and watches we don't see much nowadays but that are past of the brand's history.
Many are not well known and there are not many exhaustive sources, the Foulkes book is a great source about Patek indeed, maybe the best one.
People often judge from what they know but the range of models Patek has created are not always on the front and there are marvels to discover.
Thank you Aron
Best, Mark