Editing existing information

How do I add additional info about coins. Such as some Guernsey coins are listed, but without pictures in most cases, and I would like to add the mintages for every year.

https://en.numista.com/catalogue/pieces29955.html

   I chose a Guernsey coin at random (could be from any country) as at the end of the page is a link >

► Contribute to the catalogue
Modify or add data about this coin

   So find the coin you wish to amend (mintages or pictures or anything) and click on the link.
Welcome to the site.  

If there is not an existing picture there seems to be no way of editing the facts about it.

  You can still edit the page - just click on the link and type in the words. Does not matter if there is a picture there or not. Such as that link I gave; no picture, but that link is still on there.  
   Or add here the link to the page and I can look at it.

The coin is KM# 10 Guernsey 1 double 1930. Listed under that coin are the rest of that series without pictures or any information. If I try to edit KM# 10 the message says the info has been verified so it does not allow me to edit that coin or those following. What am I doing wrong?

  I see - on top right of that page is a tiny notebook with 123 and a green tick on it. Meaning 'Verified sheet, complete year list' so though you only want to add mintages (thanks for that) the system would think you were wanting to add a year, which you are not of course.
  You can send me a Private Message - with the coin link and the year mintages if you like, then I can do it for you, then let you know so you can check I did it right.  

https://en.numista.com/catalogue/pieces14768.html
   That is KM# 10 but is not for 1930 as it is 1830-1911 only.
What pictures do you refer to, as the first page of Guernsey all has pictures there.
Each page only has a picture of each side of the coin, so members can see what it looks like; there will not be a picture for each year on that page - as only the year changes and the rest of the coin stays the same.

Mintages for 1 double Guernsey
1868   64,368
1885   76,800
1889  112,016
1893   56,016
1899   56,000
1902   84,000
1903  112,000
  
Regards   Mike Crew

https://en.numista.com/catalogue/pieces14768.html

   Now added - thanks.