I recently discovered this piece at a second hand shop. I have hit a wall. I think its dutch, but not sure. I think its a chart reading or timekeeping tool... but not sure. PLease help!!
First picture shows the Dutch ..Z II mark for .835 fineness used 1953/present. This mark is used for objects submitted in finished conditions /import, without office and or date letter.
I believe it is a portable/travel sundial.
It still might be old. The Z mark was struck on imported items without valid assay mark. Also on imported antique silver which were brought to the Assay office. A valid date letter only makes it easier to determine its age.