Okay, just found an auction that I may be really interested in.

What do you think, the coin discussed is a French Indo China 10 cent 1928 KM#16.1
It was produced in: 1921, 1922, 1923, 1924, 1925, 1927, 1928, 1929, 1930, and 1931 as a Proof.
My delemis is: 1923, 1925 or 1928
What do you think?
VS