I had never see before an actual DMM7510 Calibration Report Certificate - Traceable CAL.
But this opportunity, this shown today.

About seven years ago,
Tektronix EU, this offered to me the choice of a DMM7510 purchase, at a special price.
Their plan proposal, I to receive as a loan, of a NEW 7510 as product sample, for a public review.
If I wanted to keep it? Then I would accept from them a friendly pricing quote.
I did turn down this proposal, mostly because Tektronix Firmware developers team, this was very sluggish at solving DMM7510 firmware issues.
.................................................
How much you can learn by inspecting one DMM7510 Calibration Report Certificate? 
First thing that caught my eye.
10V DC High / Low limits = if the DMM found within, Tektronix consider it as
within tolerance. FLUKE Calibrator output: 10.000000
DMM7510 measurement: 10.000010
Low limit: 9.999848
High limit: 10.000152
.................................................
An second interesting detail,
ACA bandwidth testing frequency. CAL inspection this is focused at:
40 Hz
1 kHz
4.9 kHz
And or, at bandwidth range 40Hz ~ 5kHz
.................................................
Summary report: 179 tests were performed.
Keithley - DMM751x - of 2019 production