The "Production" field in the upper right of the Job Details->Operations->Details tab?
The original is "nnn,nnn,nnn,nnn.nn"
If that's not the one, then you should open the "Base Only" version to see the original settings of whatever field you want.
As a side note, pre-setting the mask or format of a field in a grid rarely works. I think i's because the grids are built at run time. So any grid settings (even via code that runs on form startup), get overwritten when the grid is built.
Calvin