Early 19th Century Universal Equinoctial Dial (German-Made)

An interesting early 19th century Universal Equinoctial Dial, likely German or Dutch made. This folding dial features 2 latching hooks, original glass, blued-steel needle on Ruby pivot, locking bar, graduated equinoctial ring, compass card, and collapsing latitude scale. Intended for -7 degree magnetic variation, this dial was likely made for a Polish audience, functioning best near Warsaw. Hand-cut screws, with a '3' marked on inside of folding latitude scale.  Roman numeral hour markings,  measurable to 15-minute intervals. Folding latched Mahogany box with original hardware and glass. 

Weight: 4.2 oz.

Dimensions (Closed): 3" x 3" x 1"

Height (Open): 3.5"