Movement
Re-engraved or restamped grade designation
CriticalProbable
What to inspect
A 992B represented as a 950B is the classic Hamilton fraud and it is committed on the movement rather than on the watch. Look for engraving that differs in depth, tool character or alignment from the surrounding factory marking, for a serial prefix inconsistent with the claimed grade, and above all for a jewel count that does not match. All three have to agree.