Bon, après avoir contacté Orient (réponse très rapide, moins de 12h)
ils m'ont répondu ceci :
Dear Sir,
We received your e-mail dated 02 Oct, 2009, thank you very much.
With reference to the model J38909, we would like to inform you of its details as below.
With Orient movement J3820, made in Japan
Accuracy: +-15sec./month
Battery: SR936SW / life about 2 years
Function: Date, Moon's age, Stopwatch,
Gold plating case with leather strap
Water resistant to 30m (3ATM)
We started to produce this model from Sep, 1989, and sold more or less 2 years.
Please feel free to contact us if you have any further questions.
Thanks and best regards.
Orient Watch Co., Ltd.