Most of the offerings in Seiko's 6139 line up are quite easily recognizable , but one variant stands alone in it's architecture. The "Pulsations," as it's more commonly known, is an eye-catching doctor's chronograph with features all it's own, and an undeniable presence on the wrist. This example from November of '69 boasts a matte black dial with polished applied markers and hands. The chronograph hands stand out in a flash of red, and the sweep hand is the original and correct "two-piece" style. Just beyond the dial is the rotating inner bezel in a glossy black and silver, and is laid out in a "Base 10" scale for determining a resting heart rate. The case sports a low profile bezel and sculpted lugs, and has a thinner profile perfect for sliding just under a crisp cuff. For contrast, we've paired it with a light brown distressed leather that sets off the dial and is the perfect middle ground between casual and formal.

Clockwork Synergy Light Brown Distressed Leather with Reverse Stitch (clockworksynergy.com)

Serviced 9/7/17