Suriname 10 Cents KM#13 or 25 Cents KM#13a?

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Hello.
I have 10 Cents - Suriname 1989 and 2009 - NON-MAGNETIC!
What it is: KM#13 (1962-1986) Copper-nickel
or KM#13a (1987-2012) Nickel plated Steel?
https://en.numista.com/catalogue/pieces1024.html
https://en.numista.com/catalogue/pieces9523.html
Thank you.
You're not the first one to stumble.

https://en.numista.com/forum/topic25147.html

So far the catalogue has not been adjusted because of 'insufficient evidence'.

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