Observation binoculars - Chevalier-Paris stara lornetka operowe z mosiądzu i masy perlowej - 1920-1930 - Frankrike
teaterkikkerter - Rare Vintage Emil Busch "Multinett" D.R.P. Green Leather Opera Glasses with Pouch - Germany - 1930–1940 - Tyskland - Emil Busch
teaterkikkerter - Vintage French/Japanese Mother-of-Pearl Opera Glasses (2.5x) - Modèle Déposé - 1950–1960 - Japan