Eterna-Matic Centenaire 61 automatic watch

Stylish Eterna-Matic with gold plated case and hidden crown. Crystal is in good condition, no big scratches or cracks. Dial is in good shape for its age. Case has signs of wear and age on it and the caseback has a very light engraving on it. Leather strap is used. Service history is unknown but the watch is working and running approximately +- 20 seconds per day.