Watch slow to start

[RedVitus]

I have a watch that does not start until near fully wound. Usually when I put a watch in beat it starts after about a few winds, but not with this one.

It is an Elgin 571 that I serviced and would like to ask the community what might cause this?

It has a new balance staff, and is running with good amplitude around 280 degrees fully wound. The only adjustment I made so far was to rotate the h/s collet and reduce beat error from 3.5ms to 0.9 ms.

I don't know what other faults might cause this, or whether it would be considered a serious defect or just a nuisance. 

I thought one potential cause could be from somebody moving the banking pin screws. Zooming into a photo and see faint screwdriver marks on one of them (right screw). Could thus be the Culprit? What else should I check?

 

[rodabod]

If you suspect the banking pin adjustments then inspect the depth of lock of the lever / pallet stones.

[JohnR725]

13 hours ago, RedVitus said:

banking pin screws

A unfortunate problem with watches with movable banking pins or just about anything else that moves in the watch is that people like to move things.