This is an apolitical forum for discussions on the Axis nations and related topics hosted by the Axis History Factbook in cooperation with Christian Ankerstjerne’s Panzerworld and Christoph Awender's WW2 day by day.
Founded in 1999.
It's an SdKfz 253 artillery observation vehicle that has been modified by raising the height of the superstructure.
Here is a color profile from a Wydawnictwo Militaria book:
Also, see here - scroll to the bottom of the page.