This is the classic 6138-0040 bullhead chronograph that was made between 1975 and 1978. Some say that its sheer rarity puts its desirability, the 6138-0040 was one of the best JDM Seiko Chronograph ever produced, using 6138A automatic movement that mostly equipped the Seiko Two Registers Chronograph watches.
The 6138 line are the highly collectible, Seiko designed the 6138-0040 Bullhead as the most advanced in chronograph watch technology for professional sportm
| MOVEMENT | ORIGINAL AUTOMATIC MOVEMENT, Cal. 6138B, Twenty One (21) Jewels Chronograph Mechanism. Professionally serviced just recently and is running well. |
| METAL | Solid Stainless Steel Case and Case back. |
| CASE 'n SIZE | ORIGINAL FACTORY CASE WITH ORIGINAL . . Width: 48 mm excluding crown; length: 45mm from lug to lug. Thick: 18mm with bezel. |
| DIAL/MINUTE CHAPTER RING/HANDS | ORIGINAL SEIKO 6138-0040 BLACK DIAL AND HANDS |
| STEM/CROWN | ORIGINAL STEM ORIGINAL CROWN It Comes With English Day Wheel. |
| CRYSTAL/Retainer RING | Original Hardlex Crystal with minor scratches Crystal is attached with crack-free ORIGINAL CRYSTAL-RETAINING RING NOT glued. |
| Rotating BEZEL 'n INSERT | ORIGINAL BEZEL RING ORIGINAL BEZEL INSERT. |
| BRACELET/STRAP | It comes with Original Seiko Hering Fishbone SS Bracelet Z050S strap. FAT SPRING BARS are used in this watch as Seiko diver should come on fat spring bars. |
| SERIAL NUMBER | 725673 which dates production back on February 1977. She is 37 years old. |
| WATER RESISTANCE | Not Stated |
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