Panorama slide: Small ('toy') format -- 6 cm
Sample image of this type of slide – slide shown is slide 11 of [Miscellaneous Gebrüder Bing slides: 6cm size] (miscellaneous: Gebrüder Bing, 12 slides, n.d.)
Museum Sloten – reproduced by permission. Digital image © 2018 Museum Stedhûs Sleat - CC0 (no copyright).