by the artist, lower left in graphite, below plate: Lydia und Berty; by the artist, lower right below plate in graphite: Hubbuch 21; by later hand, lower left verso in black ink: (not deciphered) (Egler's Frau) / geb. Schafer; by later hand, lower left verso in blue ink: (not deciphered) v. Ellen(?) Hubbuch
(Jörg Maas, Berlin); purchased 2000 by NGA.