Seiko Rallymeter 7015-7010 Flyback Chronograph Guide

Features:

The Design. The Rallymeter firmly rides the line between ugly and pretty, thanks to its unapologetically functional design. The tachymetere and various slide rules aren’t afraid to crowd its face - making it an obvious product of its time. 

The Features. Despite the sheer amount of information on display, the design carefully separates each element, allowing the watch to remain legible.

• The high-contrast, bi-directional tachymeter allows for easy speed calculations
• Sitting below the tachymeter is the 10-90 logarithmic track. Its elevation above the rest of the dials gives it visual clarity
• The concentrically brushed silver ring is a minute and hour slide rule for conversions - split by a dazzling blue that Seiko has employed on other examples of Rallymeters from different eras
• And finally, the applied hour markers sit centrally on a black sunburst dial

The Chronograph. The bright orange seconds hand belongs to the flyback complication. Thanks to the vertical clutch setup, it’s mechanically preferable to leave the chronograph running continuously, unlike horizontal clutches that wear out if used for too long.

The Usage. Ultimately, you and I both know you’re going to use this like a chronograph. The fact it functions like an analogue computer means nothing to most people in a world where we have digital computers in our pockets. It’s from a bygone era - but fortunately, Seiko didn’t sacrifice form in pursuit of function with the 7015-7010. Modern collectors have been left with a watch that is visually compelling, however they choose to use it.

Specifications:

Movement: 7015 Automatic Flyback Movement, 21600 bph, 21 Jewels 

Dimensions:

• Case Width: 42.0mm
• Lug to Lug: 45.0mm
• Case Thickness: 13.3mm
  
• Lug Width: 19mm