Workaround with TwinView

ATTENTION! THIS POST IS OUTDATED!

FINALLY:

xsetwacom --set "Serial Wacom Tablet" "TwinView" horizontal
xinput -set-prop "Serial Wacom Tablet" "Wacom Tablet Area" -24780, -12390, 0, 18630
xsetwacom --set "Serial Wacom Tablet eraser" "TwinView" none
xinput -set-prop "Serial Wacom Tablet eraser" "Wacom Tablet Area" -24780, -12390, 24780, 18630

or, sometimes they work with the same settings... still testing... still testing...:

Wacom options

xsetwacom --list
xsetwacom --list --verbose
xsetwacom --list param
xsetwacom --get "[device]" all
xsetwacom set "[device]" "[option]" [parameters]

xinput list
xinput list-props [id]
xinput set-prop "[device]" "[option]" [parameters]

man wacom

gedit /usr/lib/X11/xorg.conf.d/10-wacom.conf