Seiko Prospex Speedtimer Mechanical Chronograph: SRQ043

Reading Time: 2 minutesThe creation of the 1969 Seiko Speedtimer was an important landmark in the history of the chronograph. It was one of the world’s first automatic chronographs but its true significance lay in that fact that its movement, Calibre 6139, was the first to incorporate both a column wheel and aContinue Reading