Gramans Medieval Style 15th C Wooden Clock Spain

This is a very rare Gramans of Spain Hand Made Wall Clock that is driven with Stone Weights. This is an old replica of a primitive clock that was invented over 500 years ago. Clock Maker's in the 1500's developed this type of clock for the common man. There is only one hand on the clock as minutes are estimated-- not the most accurate of timekeepers! Size 13” x 6 ¾". Made in Spain. The clock is in good condition, missed a few very small needle, see pictures. Not tested. Not sure how it works