/usr/share/libwacom/graphire3-6x8.tablet is in libwacom-common 0.18-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 | [Device]
# Model CTE-630 (Sapphire) (CTE-630/B)
Name=Wacom Graphire3 6x8
DeviceMatch=usb:056a:0014
Class=Graphire
Width=8
Height=6
[Features]
Stylus=true
Buttons=0
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