Here the earlier version is shown with only 28 Jewels. If information about the later version with 29 Jewels be sought these can be found here: Junghans J83; Junghans 683.71; 29 Jewels
Further information on the caliber Junghans J83 can also be found here: The Top Product: Junghans J83
and also here: The discovery of a rarity