Seiko's third iteration of a "world time" design came in the form of the 6400. It was available in a few differing color ways, but for us, the black and orange variant is certainly the list topper. The dial is a rich charcoal black with a linen texture, and a crisp lacquer finish. At its edge is a pumpkin orange 24 hour track that can be used in conjunction with the black and orange "cities of the world" inner bezel to determine the time anywhere in the world at a glance. The hands and applied markers are brightly polished aside from the bold red of the contoured GMT hand. The case offers great vintage appeal through its tonneau style architecture and large 41mm diameter. The crown is set flush against the case, and in the neutral position can be turned in either direction to rotate the inner bezel. This example from December of ‘69 is completely original aside from a replacement crystal, and comes with the original inner box, instructions, and warranty booklet. The 6117B features hacking seconds, and is keeping near perfect time post service. We’ve paired it with a limited edition “rust” colored RAF NATO from Clockwork Synergy that looks as if it were made for this just this piece. A colorful classic with box and papers, this one is bound to be a conversation starter. 

Clockwork Synergy Rust Double Layer Two-Piece RAF NATO (clockworksynergy.com)

Serviced 12/9/18

Diameter- 41mm

Lugs- 20mm