Seiko 6139 adjusting fly-back strength

[Barnaby]

I think I'm interpereting this right, but I'm not 100% sure. So the arrow pointing towards the top of the page is labelled Heavy, and the one pointing down is Light.

Interpretation 1(probably right):  to make the strength of the spring greater, and the button harder to push, bend the hammer in the direction of the up arrow.

Interpretation 2: If the spring is too strong (heavy), then bend the hammer in the direction of the up arrow.

 

Second question: would you bend it with the hammer in situ? Or remove it from the movement first?

Third question: when it says "the fly-back position may slip", is that because the second hand/minute counter hands may dislodge? Or something else?

[yankeedog]

I think your reasoning is sound. Personally I would be inclined to bend it in place, removed you would have no frame of reference and I think the tendency would be to over do . There would also be less of a chance for the part  to disappear into the nap of your carpet.