THON, IO. H.S. |
Holland?, 1721, MIM |
Sundials, 1721 = D., P.C.(1975). |
reproductions in silver or brass, dated 1721 were for sale at the Musée d'Horologie at Chaux-de-Fonds in 1978; Mörzer Bruyns thought the name was Dutch. |
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Mörzer Bruyns 2; Brieux 1; RSW. |
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