@ggmartin
Yes, I wrote this by FA nib. FA nib was designed for Chinese character, so almost flex nib but not fit for stroke bottom to top.
If your writing pressure is very high, sometime the nib will be deformed.
This pen is 912 heritage, no.10 nib. This nib is softer than 823, no.15nib.

@Steveg58
Yes, deep red wood vanishingpoint.
Thanks about the hashtags I will use for the next toot and door find attractive toots!

@ggmartin
Hmm, I have no idea about the nib (Aoki nanyodou).
It’s really nice to hear name of Eurobox. Many my old pens are from the store.