The Eurasian Siskin Carduelis Spinus WW2 Bird Vintage Rare Postcard

ts100  This is a rare and unique vintage postcard from the Belgium Natural History Museum of this unique bird species of The Eurasian Siskin (Carduelis Spinus). Whilst the card does not state the date this was published in 1940 and souvenir for visitors of the Musee Royal Histoire Naturelle De Belgique of the era with beautiful full painting of the bird - has very light corner surface impressions from former album storage but is outstanding condition (postally unused too) & specialist  wartime souvenir.