Model of the porphyry works in Älvdalen. A texted label on the object: "Model of stone grinding and sawing invention, such as a project for the establishment of the Elfdahl's porphyry work. Inventoried by Mr. Hagström".
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Title: The Älvdalen porphyry works
Creator: Peter Häll
Provenance: Donation by the Royal Institue of Technology, 1925