

I'm hoping that someone where is an expert on these coins and can assist me with a more specific identification. I realise that this is a hard ask but I've seen miracles on this forum before.
Apologies in advance for not taking it out of the holder. However, since the scan is as clear as the coin itself, I hope that this can be overlooked in this instance.
I'm also including this "enhanced" version of the reverse.

I can't see anything useful here but perhaps someone else can, or even just give me an approximate time period based on the obverse design. Any assistance will be very much appreciated.
The coin is about 18mm in diameter and weighs 5.22g including the holder.

