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https://en.numista.com/numisdoc/calendar-thai-33.html
The year is on the first picture in the ring around the hole

And which coin/year is this?
It's not the regular Thai calendar, but Rama calendar (used until 1912)… year 128 (

), which corresponds to 1909
(I figured that out by searching for holed coins and luckily all the dates are in the comment fields!)
minted in the wonderful city of Brussels 🥳
Sorry, the coin still uses the Rattanakosin era and I thought the converter page had a bit more information then it actually has but you can still use it to transcribe the number.
According to the credo “Teach a man fishing instead of giving him one” … the search has many different filters. Use Thailand for country add the shape and the diameter then you will 100% get a hit. Then just search for a 3 number year and compare the symbols if you don't have transcribed them already and voila your done with finding and adding your coin.
Ah shouldn't have gotten distracted while writing a response … a veritable teaching moment averted 😅

yes, give him a clue, spare him a lecture!
Sorry but someone with a 4+ year membership should usually know how to use the search.
Even if you just used the diameter 17-18mm, the shape ‘round with a round hole’ and composition ‘non-precious’ you would have gotten around 50 hits very manageable. If you'd had a magnet and deducted that it's nickel you would have gotten 1 hit. It's nothing obscure or hard to identify (maybe the year how the thread got started).
If you know how to handle this Numista tool the site experience can only improve.

And which coin/year is this?
Sven Arink
And which coin/year is this?
Sven Arink
And which coin/year is this?
🙄 maybe look here … https://en.numista.com/forum/topic120583.html#p982439
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