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Mars Lumograph Duralar No. 1905 Drawing Leads

lead type lead size available degrees/colors package quantity package composition production date origin	graphite (with polymer binder?) 2 mm 5: K1, K2, K3, K4, K5 12 wood core with paperboard shell circa 1958 Germany
see also	Staedtler Mars Duralar 2830 drawing pencils Staedtler Mars Lumograph drawing leads Staedtler Mars Dynagraph drawing leads Staedtler Mars 48016 Duralar leadholder