Space Invaders 40th anniversary!

So I have had some time with the Space Invaders cabinet and can't get enough of it. I am a horrible player, but as I dig and play with it more I find myself immersed in this vintage technology that really stood to pave way for where we are today for processors.

They have just released this year in celebration of the original 1978 Space Invaders 40th anniversary a commemorative .999 silver coin which I have purchased to keep with my cabinet.