[T1] Does the T1 Tomahawk come with a Calibration Certificate?

No the T1 Tomahawk does not come with a calibration certificate unless you order a specifically calibrated version.  Accuracy in digital tape measures is a combination of the blade printing itself and digital encoding.

• For the physical tape measure blade printing, most REEKON blades meet a Class I standard although some may fall into a class II standard.  Blades are user replaceable and may be swapped out if needed
• As the T1 encoding (what is displayed on the digital screen) is matched to the tape measure blade and set at the factory, this is still a user editable value.
• The green laser on the T1 is completely independent of the calibration and can be adjusted by the user as needed.