If it came down to owning just one watch, there’s no question that Seiko’s 6309-7040/49 is a strong contender. Still their top selling diver to date, it’s a tool watch so perfectly executed, it remains firmly at the top of our list. Balance, contrast, and contouring all neatly assembled into a finished product that is much greater than the sum of its parts. A bare bones beauty that more than proves that less is in fact, more. This example from January of ‘85 is a prime example of how the right amount of wear can make a great tool watch even more appealing. The matte black dial is stunning. The hour markers are free degradation or discoloration, and the luminous material has only slightly begun to develop a warmer patina. The hands have retained their mirror finish, and are free of any oxidation or corrosion. The bezel rotates with a firm click in either direction, and though the insert shows a fair amount of wear, it is even throughout and the markings are still clearly legible. Contrasted against the flawless dial, the bezel adds just the right amount of character to this 35 year old tool watch. The case is unpolished with some light wear throughout, but the factory finishes are still clearly visible, and the corners are crisp. The case back shows some tool markings, but the original markings are still clear and well defined. Both the case back and crown screw down tightly with ample threading. The 6309A is keeping near perfect time post service, and ready for many more years of reliable service. We’ve paired it with an olive drab Paratrooper strap that’s both comfortable and versatile, and contrasts nicely against the dial. Completely original aside from a replacement crystal, it is a true Seiko icon, and a must have for any collector.

CNS Olive Green Paratrooper Strap with Adjustable Stainless Steel Hardware (cheapestnatostraps.com)

Serviced 10/30/19

Diameter- 44mm

Lugs- 22mm