Zodiac Sea Wolf "Blue Point" Automatic Chronograph
Reference: 406.49.74 (circa 1990–1997)
Movement: Swiss Made ETA (Valjoux) 7750 , 25 jewels, high-beat (28,800 bph).
Case: Full Gold PVD-coated stainless steel. Diameter: 39mm (classic mid-size pro diver).
Dial: Glossy Black with three sub-dials. Signature Blue Point logo between 4 and 5 o'clock.
Functions: Chronograph (1/4 sec, 30 min, 12 hr), Day-Date at 3 o'clock, small seconds at 9 o'clock.
Crystal: Scratch-resistant Sapphire.
Bezel: Unidirectional rotating diver's bezel, black insert with gold markings.
Water Resistance: 100 Meters (10 ATM) with screw-down crown and case back.
Bracelet: Five-link (Jubilee style) gold-plated bracelet with professional diver's clasp.
Please help me find the serial number on this watch. Where is it located? Thank you.