Alan J wrote:

[Rotring 600 pencil with 0.9 mm lead]

The only 600 pencil I've ever seen was 0.5mm just like
everything else of that day.

They definitely did 0.7mm in the silver finish - I've got one.

This expired Ebay (Germany) listing *appears* to show 0.5 mm, 0.7
mm, and 0.9 mm pencils, though the "600" is unreadable on two of
them.

http://tinyurl.com/lehlles

or

http://www.ebay.de/itm/Rotring-600-Druckbleistifte-Old-Style-Set-0-5-0-7-0-9-Lederetui-/141036824648?nma=true&si=VTHL9vuZMOIMxXsmxe9Duffad Eg%253D&orig_cvip=true&rt=nc&_trksid=p2047675.l255 7

--
Steve

My e-mail address works as is.