2 Interesting Spy Glasses, 19th Century

4 Opera Glasses

2 Gold-Plated French Spy Glasses

4 Monocular Opera Glasses

2 Attractive Opera Glasses

3 Opera Spy Glasses

Rare Venetian Single-Draw Telescope, c. 1750

A Rare and Fine Monocular Telescope, c. 1830

4 Monocular Opera Glasses

4 Monocular Opera Glasses

2 Brass Spy Glasses

Chevallier Spy Glass and 2 further Opera Glasses

Monocular Opera Glass, c. 1880

Admiral Togo-Glas by Carl Zeiss Jena "Marine-Glas m. Revolver",

7 Spotting Scopes or Monocular Telescopes

Schmidt & Haensch Polarimeter, c. 1885