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courtesy Allan Macdonald collection
 

Fedra Constant No. 553

Fedra, Germany

lead type
lead size
available degrees/colors
package quantity
package composition
production date
origin
graphite
2 mm
18: 7B–B, HB, F, H–9H
12
plastic box
1960s
Germany
  
see also Alvin Constant leads
Hellerman Ltd. 1963–64 catalog, p 68