Hi there collectors!
I'm new to the forum, but looking forward to learning and sharing with UK collectors.
I was given the 2016 Farewell & Nations of the Crown 2016 UK £1 Brilliant Uncirculated Presentation Pack lasy year as a present, which features the special 'Cross Crosslet' mint mark 12-sided pound coin.
For clarity - it is this mint mark:

Apparently this specially marked coin only exists in this presentation pack and there were only 10,000 minted. That makes this coin pretty darn rare.
To put it into context - A BU Kew Gardens 50p sells for up to about £140 on
ebay, and the mintage figure for that was 210,000 - so going on official mintage figures - that makes this coin 21 times rarer than that.
I guess a nearer comparison would be the 2016 Peter Rabbit Silver Proof coloured coin - with 15,000 minted. That coin now sells for about £800.
This coin is rare than that too.
So based on all that, I have a few questions.
Has there ever been a similar coin released in similar rareness to this, and if so, has it appreciated in value to the same extent as Kew Gardens or Peter Rabbit - or are these coins exceptions?
Does anyone have any coins like this in their collection, and had them valued years later to find out they are very valuable?
Cheers!
Lee.