This auction for very nice old used Antique Iron Marine Inclinometer W/ Plumb Bob Navigation Nautical Instrument. item is real old and in in great condition for its age. very hard to find with plumb bob. purchased from 80 year old Florida nautical collector. item measures 10" X 10" with wood backboard. not sure of era but judge by font, plating and construction. item ships as is, shown and described. item ships for $11.50 email for combined shipping.