Darker's Projection kaleidoscope. 2 mirrors
Darker's Projection kaleidoscope. 2 mirrors, V arrangement in brass tube, between two lens element. Separation of latter adjustable; whole focussing by sliding fit in screw flange for lantern.
Darker's Projection kaleidoscope. 2 mirrors, V arrangement in brass tube, between two lens element. Separation of latter adjustable; whole focussing by sliding fit in screw flange for lantern. In fitted wooden box. See 1990-5036/449. (M 4078)
Darker's Projection kaleidoscope. 2 mirrors, V arrangement in brass tube, between two lens element. Separation of latter adjustable; whole focussing by sliding fit in screw flange for lantern.
Fitted wooden box for a Darker's Projection kaleidoscope.