Hand spectroscope

 

Schmidt Haensch, Berlin
Nickel plated brass direct-vision hand spectroscope (length 9.5 cm) with six revolving lenses and an accessory tube with a lightsource to projext a 400 to 800 nm scale on the prism. In a wooden box (original red velvet lining is missing).
Signed "Franz Schmidt & Haensch | 1476", first half 20th century.

private collection

Hand spectroscope, Schmidt Haensch, Berlin

Hand spectroscope, Schmidt Haensch, Berlin

Hand spectroscope, Schmidt Haensch, Berlin