The assembly continues by reviewing the chronograph runners on which the second and minute hands will be mounted.  This is the top of the central seconds runner where the heart is fitted.  This is fine as are the pivots.

UK watchmaker showing service of Omega Speedmaster - chronograph runner review

A detail of the teeth on this wheel, again these are fine.

UK watchmaker showing service of Omega Speedmaster - chronograph runner review

And on the underside is the cam that will operate the minute counter.

UK watchmaker showing service of Omega Speedmaster - chronograph runner review

That cam interacts with the runner intermediate wheel and it will turn one tooth every minute in a single step.  All teeth and both pivots are fine.

UK watchmaker showing service of Omega Speedmaster - intermediate runner review

Which will in turn, move the minute runner, on which the minute counter hand is mounted, once every minute in a single step.  Both pivots and the teeth are fine on this wheel as well.

UK watchmaker showing service of Omega Speedmaster - chronograph minute runner review

On the upper side, this also has a reset heart.

UK watchmaker showing service of Omega Speedmaster - chronograph minute runner review

Here are the three parts, plus a tension spring for the seconds runner, mounted on the bridge.

UK watchmaker showing service of Omega Speedmaster - chronograph runners mounted

This is the minute jumper and the right hand side will work with the wheel teeth of the minute runner.

UK watchmaker showing service of Omega Speedmaster - chronograph minute jumper review

And it is mounted on a post on the underside of the chronograph bridge – the spring tension here is important.

UK watchmaker showing service of Omega Speedmaster - chronograph minute jumper spring

And fitted and the spring has clipped onto the flat side of the minute jumper boss.

UK watchmaker showing service of Omega Speedmaster - chronograph minute jumper fitted

The jewels and bush in the chronograph bridge are reviewed and these are clean and undamaged.

UK watchmaker showing service of Omega Speedmaster - chronograph bridge review

The chronograph bridge is fitted to the movement to support the pivots of these wheels.

UK watchmaker showing service of Omega Speedmaster - chronograph bridge fitted

The assembly continues with the chronograph brake and the coupling yoke.