With descriptions added to the back of the photograph:
1) in ink in Hanns Weltzel's hand:
1935

2) in ink in Klara Weltzel's hand:
Fullu  
                 Laubinger
Dizer
Beetschu Thormann
Weißka, Fam. Gritzner Bessu

3) also contains a stamp:
Hanns Weltzel Dessau


Depicted in this photograph are (left to right):
Georg Laubinger; Kurt Laubinger (2); Gustav Thormann; Paul Ansin.
In the far right in background: Lina Laubinger.

Please refer to the table in GLS Add. GA 3 for additional details on these individuals, along with alternative names and spellings with which they may be identified.

Although very similar, this photograph is not an exact duplicate of GLS Add. GA 3/1/77 - shows more of Lina Laubinger.