Same issuer/value/year icon

Hi,

I would like to suggest an icon behind a year line which suggests to have a close look at the coin you are about to add to your collection since there is a coin (or more) with the same issuer, value and year, but perhaps a different design or different composition. In that way people are warned to have a closer look at the coin they are about to add. Small differences can be hard to distinguish and mistakes are easily made. To be clear I don't necessarily mean the coins which are on the line right underneath in the list, but with a whole different page, different KM number.
Thanks!

These coins should appear in the see also section if the coin page is made right.
For example this 5 yen page (https://en.numista.com/catalogue/pieces2676.html)

Cita: "Idolenz"​These coins should appear in the see also section if the coin page is made right.
​For example this 5 yen page (https://en.numista.com/catalogue/pieces2676.html)

​Well, they could appear there, I agree. But it would rely on the participation of the referee (and/or other users), whether the list is complete.
Second problem is that that 'see also'-list can contain a number of coins, like other coins in the series, other coins of the same year, other coins in the same style with different nominal values etc etc
I think this icon or mark can automatically be generated using the parameters mentioned above, with little chance of error.