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« on: June 04, 2010, 08:17:38 am »
This is some type of navigation or drawing tool passed down in my family from my grandfather. It seems to be made of bone (or ivory) with a carved wooden inlay. The bone is carved and the straight measurements are marked at 1 inch intervals (divided into 10 spaces). The measurements on the curved section is marked in 11 segments, each divided by 4. The piece pivots and the curved part slides nicely through a space in the straight edge. The pivot pin seems to be made out of metal but is is very small. One of the straight sides has a small hole is the very bottom where is looks like something could be inserted.
Does anyone have any idea what this might be? Does it look like it would be really old? My grandfather and mother have both passed away and I am not sure who else to ask. Thank you so much for any help you can provide.
Thanks again,
Sean