Pocketwatch balance staff for Ball 999G

[LittleWatchShop]

Save me from turning a replacement.

I cannot seem to find any reference to a staff for this movement.  In pocketwatch database, it is referred to as a Hamilton-Ball.  I do see some Hamilton watches with 99x numbering.  Maybe I am looking for the wrong thing.

I have the old staff with one broken pivot, so I can turn  a staff...though I never get very close to factory.

[mbwatch]

Is it a friction staff or riveted? Hamilton had switched to mostly friction staffs on their railroad watches after the 992. If you can get good measurements, I expect it will match one of the Hamilton staffs listed here https://pocketwatchdatabase.com/reference/balancestaffs/hamilton

[LittleWatchShop]

38 minutes ago, mbwatch said:

Is it a friction staff or riveted? Hamilton had switched to mostly friction staffs on their railroad watches after the 992. If you can get good measurements, I expect it will match one of the Hamilton staffs listed here https://pocketwatchdatabase.com/reference/balancestaffs/hamilton

I was at that page earlier today.  Not sure if it is friction or rivet.  Will go take a look and take a few measurements.

Ok I believe it is rivet fit.  Based on a couple of measurements, I think it is part #126 on that page.

Here are some images. I need to replace the roller jewel as well.

[CYCLOPS]

Hi, it looks like the 18s Hamilton 940 double roller movement....