Ottoman Empire - 1/2 zolota 1115 Ahmed III - two questions

Hello

Here is my ½ zolota 1704 (AH 1115) coin. 

Finding the reference was easy N#53698

My coin has 29mm in diameter and above reference indicates that the correct one should be 26mm instead of (the weight seems fine - 9.8g).

I've found few same coins on different auctions finding both diamater variants - 29mm vs. 26mm.

I wonder why there is so significant difference in weight between them…. Maybe someone could give me a hint?

The second thing I want to ask is a table under the Numista reference.

What does it mean?

Always use zeno to see multiple examples to compare weight and size , the words are names of Arabic letter  used as mintmarks.  See examples on the zeno link

ttps://www.zeno.ru/showgallery.php?cat=18170

Thanks  so much. It seems that the diameter varies depends of the specific coin :)