1959 Hong-Kong 10 cents year line

Please can the 1959-year line with no mintmark be added please as I have this coin and comparing it to others that I have with the H mintmark I cannot with a magnifier see a H under the N like the others I have, happy to be corrected if someone has a reference book:

https://en.numista.com/catalogue/pieces1574.html

Thanks

It looks like you do have a 1959H:

the 1964H is very clear, on the 1959 there's nothing there, even after changing the lighting. I can't get any better magnification sadly.

oh yes, an "H" is there

As a matter of fact, I was just puzzling on a 50cts 1958H which I received from a swap last week.

According to the coin page, this should exist with mint mark H only. But how much I try, I don't see it.

Apparently, the mintmarks on these coins can be very hard to read.

Or don't exist at all...?

They wear off easily.....