Junghans
Junghans has 4 watches in the database across 2 model families. Lug-to-lug runs from 40 mm to 41 mm, with a median of 41 mm, alongside case diameters of 38 mm to 45.5 mm and thickness of 10 mm.
None of them fall in the balanced range on a 6.5-inch wrist, so check the wrist guide before choosing.
The most documented family is 1972 Competition Chronograph (3).