I have a question about a vintage four colour pencil.

On the clip is stamped the word KULI, which Google shows me to be a
name once used by Rotring.

The metal parts are of plated 'Walz Gold' and the pen has a shiny
black plastic central body with a Rotring style red band.

The screw-down cap for the clip has stamped into it the letters
'DBPa'.

I have posted a photo of the pen at

http://www.box.net/shared/static/9rkxl4315a.jpg

Was this pencil made by Rotring? If so, approximately when?