When recalling vintage Seiko GMT models, undoubtedly the 6117 World Time and Navigator Timer models are the first, and likely only, that come to mind. There is, however, one other reference that outranks and out maneuvers the afore mentioned models, and truly deserves this wordy introduction. In production for just two short years between 1972 and ‘74, the 5619-7000/19 “Duo Time” is one more example of the technical wizardry that set Seiko so far ahead of the curve, they’d begun to run out of track. Built on the same 56 base as the KS and GS references of the era, I can’t help but point out the missed opportunity of a King Seiko or Grand Seiko GMT presentation. However, the standalone “Duo Time” moniker doesn’t make this one any less desirable. Like the 61 models, most if not all GMT movements to this point operated by slaving a 24 hour hand to the existing 12 hour hand and determining local or GMT time by adjusting an inner or outer 24 hour bezel accordingly. The 5619 allowed for independent quick setting of the 24 hour hand, thereby removing the need for a rotating bezel, and granting the option of a cleaner, more casual layout. It would be a full decade before the Rolex GMT Master II could offer the same complication. 

The operation of the quickset mechanism for the 5619 hinged on the strength of a plastic six point star gear on the rocker, and so many did not survive after decades of use. No viable replacement for this gear existed until very recently, and thanks to Adrian at Vintage Time Australia, perhaps a few more of these incredible watches will be revived. This example from February of ‘73 is an absolute stunner. The dial is a flawless metallic blue linen with a subtle north to south grain that appears to be several shades of blue depending on angle and lighting. Just inside the polished applied baguettes are baby blue hashes at each hour, and small luminous plots dot the outside. A 1/5 second chapter in black with silver printing provides a contrasting frame. The hour and minute hands are thin, polished batons partnered with a slender sweep, and the 24hr/GMT hand is a stout contoured arrow with orange trim and a large luminous window. The case is a mixed finish, contoured tonneau with beveled edges, and at 36mm it’s incredibly versatile. It comes attached to the original tapered “H” link bracelet for a seamless and comfortable fit and finish. It’s unpolished and completely original aside from a replacement crystal and quickset gear, and post service is keeping near perfect time. The date and hour quickset are operating as intended. A rare catch in any condition, this one is sure to be a highlight in any collection.

Original Seiko Tapered “H” Link Bracelet in Stainless Steel

Serviced 9/27/21

Diameter- 36mm

Lugs- 18mm