Hole Diameters

When adding a new page for a coin with a hole,  should I mention the diameter of the hole?

Hello 🤖

Without pictures, it will be very difficult for anyone to help you. Could you please post clear pictures of each side of your item?

Please note that this is an automatic message. Feel free to ignore if it is not relevant.

They exist all ways.  Some have the hole size comment attached to the shape, some in the comment section and some (I'd guess most) do not mention the hole size.  I say, if you have the information, might as well include it.

This is a good topic, I recommend moving this thread to the Coin Catalogue forum, for discussion.

I have the diameter of nearly all my coins with holes. Unfortunately, the diameters for the same type varies rather a lot, so it can never be a data used to identify a coin.

Here two examples from the Danish 1 & 2 oere coins, and now also 5 and 10 oere coins:

Edit, I forgot the years:

and I'll stop here!

Just to show, that France is not much better!

Sjoelund

I have the diameter of nearly all my coins with holes. Unfortunately, the diameters for the same type varies rather a lot, so it can never be a data used to identify a coin.

 

Good data.  So what would be your suggestion since most people would only be measuring the hole size of one coin?

and here from Norway

my conclusion is, “Forget about it”! The variations are much too big, so the value of the data is not trustworthy, I have it my collection file just for the fun of having it, but that's all?

But why is the deviation so large in the first place? There doesn't seem to be a larger hole trend over time to maybe save material costs (for coins where the hole gets stamped out after minting). Is it to adjust weight because the alloy was changing so much or did they just use what ever size cutting stamp that was laying about?

Maybe just a function of the repeatability of the punch process. Even though the percentages are large the actual diameters are at most 1 mm different which also includes any measurement errors.