In the article https://en.numista.com/catalogue/pieces10895.html
there are comments about 1928 and 1930 with different styles of dates.
Does it worth to add some more about the date 1929 as well? There are such 3 types for example:
Die 1: the first 9 is not high, the last numeral 9 is very thick
https://i.ebayimg.com/images/g/JTAAAOSwy1VZuUXL/s-l1600.jpg
Die 2: the first 9 is high, the last 9 is thin, similar to the first one
https://i.ebayimg.com/images/g/luwAAOSwBwBZjiyM/s-l1600.jpg
Die 3: Numeral 2 is high, both 9 are thicker then on die 2
https://i.ebayimg.com/images/g/4wUAAOSw5dNWjEFR/s-l1600.jpg
From my small experience I met some coins of die 1, many of die 2 and not so many of die 3.