T90 “Nature Cards” with bird feathers

Unique 30-card set issued circa 1915 with La Marquise Cigarettes, a brand for refined types. The cards were manufactured in Austria and include [what we think] are feathers from actual birds. I acquired an album that had 38 of these cards glued into its pages; each page is shown below.

La Marquise Cigarettes ad

La Marquise ad

La Marquise Envelope glassine envelope

glassine envelope