This is a Lightwave model of medieval mariner"s astrolabe. There are 22 separate surfaces.

There are 4 separate named Parts/Layers:
astrolabe_dial
astrolabe_main
astrolabe_pivot
astrolabe_ring

Parts are correctly pivoted.

astrolabe.zip includes:
mariners_astrolabe.lwo
mariners_astrolabe.lws
GoldReflection.tga
astro_02.jpg (number ring UV map)

Number ring is a UV mapped texture. The disk approx. 6 inches (15 cm) in diameter.

Included images:

GoldReflection.tga
astro_02.jpg (number ring)