Worn or wobbly coupling wheel on 321?

Greetings folks.

I have an issue with a 321 Seamaster I just acquired where the chrono hand stutters/stops as it goes around the dial.

When I look at the movement through a 25x lens I can see the coupling yoke moving the coupling wheel into the chrono runner but the coupling wheel slows/stops occasionally, leading to the hand problem. The small second hand gear seems to turn smoothly so I'm wondering if the coupling wheel is loose in the yoke and/or wobbly? Is there meant to me a jewel holding in the coupling wheel as when I look closely to the center of the coupling wheel shaft (top of) all I see are what looks like 3 weld/braise dots.

Thanks in advance to those knowledgeable 321 folks & pros for helping out!

Could this be the CHRONOGRAPH RUNNER FRICTION SPRING 321-1735?

It does look like the bushing in the coupling yoke in your watch is enlarged or misshapen.

Yours

One of mine

I bet yours is a ‘watchmaker’s’ attempted repair of a worn bushing.

Awesome! Thanks @airansun and @Archer

Any idea what the bushing part number is? I took a look online and could only find the entire coupling clutch assembly for sale?

Thanks. M.

320-1724 I believe, for the entire assembly, which is the only way they come.

OK, that's what I found. Thanks for confirming.

M.