Websites
Virtuelles Museum der Augenoptik (German)
Resource verified by SHCG editorial group
Notes:
This website is only available in German but the museum appears to have a comprehensive collection relating to the subject.
Keywords:
spectacles lens eyeglasses meteorology bifocal
SHIC codes:
1,1.4,1.41,1.412,1.4121,3,3.7,3.74,4,4.4,4.48,4.483
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