Revenue Stamp - New Font on Control Number

I noted that the RM10 revenue stamp has new font type for its control number. The new font type has a font size smaller than the old one. It would be nice if we could know when (the control number) the old font type ends and the new font type starts on the RM10 revenue stamp, and I guess this would also be applied on the other denominations of the revenue stamps....... maybe someone would like to take up this challenge to get the answer..... hehehehehehe


left is old font type; right is new font type