Will that one be traceable? Do you know its complete history with 100% certainty?
Surely he can afford a new meter if he's working on heavy equipment.
(whatever that means - a lot of "equipment" is heavy)
He's working on things like bulldozers and land graders and the like.
You would not need to know the calibration history. Just send it in for calibration to a suitable facility. The item in question was last calibrated by Tektronix in 2017.
I wonder why they did not send it in to Fluke?
New meters are only new for a short while.