Optical toy - Stereo card tissue - 1850-1900 - Tissue stereoview

Stereo tissue card of Frankfurt a/M, Germany (1865). The view shows the “Saalhof mit Rententurm” on the River Main. When viewed with backlighting, the scene is illuminated and appears as a night scene. This is a so-called day-and-night view, with hidden colors; the outlines of the buildings, windows, and stars are perforated with dots and colors.