Missing Coins in Catalog

I have some coins that aren't anywhere listed in the catalog

How do I go about adding it to the website?

One of them missing that i have is a:

1928
San Marino
10 Centesimi

Obverse:
Crowned heart-shaped shield Within wreath

Lettering:
REPUBBLICA DI S. MARINO
LIBERTAS
R

Reverse :

Lettering:
REPUBBLICA DI S. MARINO
10
CENTESIMI
Picture of a weapon and a fallen column wrapped in a ribbon
STAR

There is one release of the 10 Centesimi for San Marino. However, the one I have for San Marino is not listed from what I saw.

here is what is looks like... https://poshmark.com/listing/Vintage-1928-San-Marino-Coin-Medallion-Bracelet-5b78c61b5c44523a92aa5e53

Hi, this is a fantasy token.

Already discussed in 2012 (in French, sorry)
https://fr.numista.com/forum/topic7189.html

The main difference with the real coin is the "fallen column" which is liying on the wrong side (on the left instead of right).

Not a coin…