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  courtesy Allan Macdonald collection

Renta—Zeichner

(fluted pushbutton)

Renta Füllstift-Gesellschaft Fränk & Co., Aalen, Baden-Württemberg, West Germany

lead diameter
mechanism
composition
variations
production date
origin
2 mm
pushbutton spring clutch
hard rubber barrel, metal mechanics
unknown (colored band on button retainer?)
1955–(late 1950s)
Germany
   
special features 8 jawed collet
This thing was either very expensive or the makers lost their shirt everytime they sold one. It features a very intricate pushbutton and an eight jawed collet. The only other leadholder with eight jaws that comes to mind is the Italian made variant of the Koh-I-Noor 48 which holds a giant 5.6 mm lead.

This brand seems to have been marketed specifically to engineers, according to the tag line on this tube of Renta-Super lead: "The superior lead for the engineer."
  courtesy Allan Macdonald collection

Renta—Zeichner

(smooth pushbutton)

Renta Füllstift-Gesellschaft Fränk & Co., Aalen, Baden-Württemberg, West Germany

lead diameter
mechanism
composition
variations
production date
origin
2 mm
pushbutton spring clutch
hard rubber barrel, metal mechanics
unknown (colored band on button retainer?)
(late 1950s – 1960s)
Germany
   
special features 8 jawed collet
  courtesy Allan Macdonald collection

Renta—Zeichner

(straight barrel)

Renta Füllstift-Gesellschaft Fränk & Co., Aalen, Baden-Württemberg, West Germany

lead diameter
mechanism
composition
variations
production date
origin
2 mm
pushbutton spring clutch
hard rubber barrel, metal mechanics
unknown (colored band on button retainer?)
(late 1950s–1960s)
Germany
   
special features 8 jawed collet