Hargesheimer Kunstauktionen, Düsseldorf GmbH, Germany, sold a large private collection of drawings by a presumably German artist with approx. 388 drawings after Daumier on 6 different auction dates between 2017 and 2020.
Description: Charcoal drawings on chamois-coloured paper. Predominantly 29.5 x 21 cm. Partly monogrammed ‘H.D.’ lower left or right. Verso: mostly with handwritten title inscription in pencil.
See here SOME EXAMPLES.
Don’t hesitate to contact the DAUMIER REGISTER if you should come across one of those drawings.