Here the corresponding section from the catalog.
Mostly the Junghans 693.72 is provided with 17 jewels but this version has only 15 jewels.
Also this dial design is often offered in the online sales platforms as Max Bill Design. But this is created by the inhouse-designers of Junghans.
The attached 1 in the caliber designation (J93S1) always means that the watch has a central second. The caliber J93S has a small second.