Astrolabe Catalogue

The back contains 5 scales of the following types:

Type (click to view scale details)	Range & Units	Numbered	Geometry	Location
Degree	0 - 90, Degrees	Every 5 degrees	Circular, concentric	The entire outer circle on the back of an astrolabe.
Zodiacal signs	0 - 30, Zodiacal divisions, equal or unequal	Every 5	Circular, concentric	Circular scale immediately inside the outer scale - refers to the full circle
Calendar	First day of month - Last day of month, Days of year	Every 5 days	Circular, concentric	Circular scale second in from the outer scale - refers to the full circle.
Shadow square	1 - 12, Fingers	Every 3 fingers	Box	Left hand vertical 'face' of the shadow square (in LL)
Shadow square	1 - 12, Fingers	Every 3 fingers	Box	Right hand vertical face of the shadow square (in LR)
Shadow square	1 - 12, Fingers	Every 3 fingers	Box	Left hand bottom face of the shadow square (in LL)
Shadow square	1 - 12, Fingers	Every 3 fingers	Box	Right hand bottom face of the shadow square (in LR)

The back is inscribed:

Transcription	Translation	Notes	Type
GEORGIVS HARTMAN NORENBERGE FECIT ANNO MDXXVII	George Hartmann of Nuremberg made this in the year 1527		Maker's signature