Common Exhibitions of Ch. P. Gruppe and Jacob Gerard Veldheer
Apr‒May 1907
Tentoonstelling van Kunstwerken Vervaardigd door Leden der Maatschappij
[Exhibition of Art Works Manifactured by Members of the Society]
Amsterdam
:
Amsterdam (exact location unknown)
Oct‒Nov 1909
Tentoonstelling van Teekeningen en Beeldhouwwerken
[Exhibition of Drawings and Sculptures Manufactured by Members of the Society]
Amsterdam
:
Amsterdam (exact location unknown)