"Business Card Viewer"
Blackened wooden business card viewer with magnifying glass, card presentation and storage mechanism. Napoleon III period Dimensions: 25cm high, 20cm long, 17cm wide. The lid of the box, once raised, reveals the graphoscope which, thanks to its magnifying effect, allows you to view business cards. A wheel allows you to change cards. The blackened wooden business card holder is also cut to enhance the card as if in a frame. The viewer contains around ten business cards.
https://www.lavalisearlesienne.com/product-page/visionneuse-de-carte-de-visite