Astronomical instruments were probably made after Chaucer's designs, not before.

References
Eagleton C. Stud. Hist. Phil. Sci., in press (2007) [doi:10.1016/j/shpsa.2007.03.006].
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Ball, P. Is this Chaucer's astrolabe?. Nature (2007). https://doi.org/10.1038/news070604-12
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DOI: https://doi.org/10.1038/news070604-12