Probably should have shown an example. Ebony decanter is Cambridge, Blue decanter is Louie. Note that the Cambridge pinch decanter differs from all other US pinch decanters because (1) height, Cambridge decanter is a 3/4" taller than all others, (2) disk or rim, Cambridge decanter is not a wafer type, it does not protrude very much from neck & (3) Cambridge neck is slim & rises from body further than all others which are rather stubby. Also note that all Cambride pinch decanters are three pinch design, if you encounter a flat sided two pinch decanter (see Blue example) it cannot be Cambridge & all flat sided pinch decanters that feature overlay decorations you normally might see are not Cambridge. Ken