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Cylindrical equatorial sundial in Moscow Planetarium

This instrument has a very simple construction and difficult name. I am not still sure that this name is a proper one. Half a year ago I asked my colleagues what is the best name for this construction. Bill Gottesman (www.precisionsundials.com) told that it is a polar equatorial sundial. Patrick Powers (BSS) tends to name it equinoctial sundial. Nicola Severino on the base of ancient literature has got a conclusion that it should be named as cylindrical equinoctial sundial with equinoctial gnomon. Luke Coletti (Great Circle Studio) and Sara J. Schechner are sure that the right name for this sundial is a cylindrical equatorial sundial. If nobody mind let us think that the last name is a conventional one.