Grunau Baby ErgGr(s)1

My father and I are restoring a Grunau baby 2b to fly we wish to put in wartime german markings of ErgGr(s)1 which was a training unit for military glider pilots. Has anybody any information of markings or photos of Grunau’s in S1 markings. We have seen photos of Kranich’s with S1, but not a clear shot of Grunau Baby’s that they also used.
A few years ago we restored a Slingsby Kirby Kite 1 iback into its war time markings. Now we wish to do the same with the Grunau to remeber all war time glider pilots.

Thanks

Dave