Geha 700 Schulfüller nib showing Sun logo

A photo to show the 12-rayed sun logo on the gold-plated steel nib of my Geha 700 Schulfüller from the late 1950s.

I have uploaded this photo to see if anyone else has a Geha nib with the same logo on it - I wonder whether the number of ‘rays’ on the disk of the sun may indicate anything e.g. nib size, shape, or degree of hardness.
This nib is an ‘FK’ - an ‘F’ nib with a ‘kugel’ (ball) tipping, as opposed to the flat, ‘cursive-italic’ tipping shape of many German pens of the 1950s.

The gold plating has nearly all worn off this nib now, but (in 2024) the nib still works beautifully.
 

This nib is slightly ‘springy’, or ‘bouncy’.
It is by no means a ‘flex’ nib; being slightly less ‘bouncy’ than is the steel ‘F’ nib on my Pelikan M205 from 2012, or the 14k gold ‘M’ nib in my Pelikan M400 from the 1990s (1991-97).