Vintage automatic watch Zenith 28800 Respirator Authentic prototype model Grey dial ++ Collector's ++

BrandZenith
Model28800 Respirator
GenderMen's
MovementAutomatic
Case materialStainless Steel
Diameter31,8 mm
Bracelet materialLeather
Year70s
ConditionFine
BoxNo
PapersNo
WorkingYes
Observations

Normal marks of the passage of time and usage. Beautiful. 31.8 mm without crown and 34.2 mm with crown. Unique piece: Based on the Respirator X model but with a gray prototype dial