I noticed that a Dipleidoscope is up for live auction on Ebay (USA) - this seems to be a rare offering (not in my budget!).
http://www.ebay.com/itm/DIPLEIDOSCOPE-/231365300840?ssPageName=ADME:SS:SS:US:3160 LOT 1130 Seller's Estimate: USD 600.0 - 800.0 DIPLEIDOSCOPE - England, 19th century, brass and bronze. Brass and glass prism mechanism inset into a shaped bronze case with scrolled sides. Engraved "Dent's Patent Meridian Instrument" and "67 Strand, London". 3"h. 2.25"w. 3"d. --------------------------------------------------- https://lists.uni-koeln.de/mailman/listinfo/sundial
