In no particular order, here are some of the ones I've added this year. I think they're all beautiful in one way or another. "Uniquely" beautiful? That depends on how one defines that.
Here is couple of my examples I got recently....5 Dukaten Klippe/ Salzburg/ AV 4 Dukaten Austro-Hungarian Empire
San Marino .917 gold spider...low mintage: 9,000 very rare Slovakia proof silver beetle cross. mintage: 1,800 a 15 year hunt on Ebay for this coin. where it is black on the coin has a mirror reflection.
Here is my contribution, a crown sized Thai coin. I love the design on the obverse and reverse!! 2 baht by Mkman123 posted May 25, 2018 at 7:08 PM 2 baht rev by Mkman123 posted May 25, 2018 at 7:08 PM
Alright, I'll join the party with a few entries. This thread has been super-fun to watch. This first medal counts as "unique" as far as I can tell. I have never seen another one with the same obverse/reverse design pairing, though there are different medals that pair each side with different reverses. I would love for somebody to prove me wrong and show me another one like this. Martin Luther/Philipp Melanchthon, both early Protestant Reformers. Old, probably late 16th or early 17th century, high relief.
The spider and low mintage on that are just icing on the cake, when you consider the gold and the cityview!
And here are a few beautiful/cool ones. 1817, Martin Luther and the 300th anniversary of the Protestant Reformation. The reverse design. Silver, nice toning. This one is an 1885 bronze medal from Frankfurt commemorating shelter provided to Dutch Protestants. Note how Frankfurt is depicted on the right side of the medal with the city-wall crown. This one is just flat out charming. Finally, another Protestant Reformation commemorative from 1717, Nurnberg. Obverse depicts Martin Luther, and reverse depicts the New Jerusalem. Kinda cool city-view thaler(ish) medal.
Hmmmmm - well, as it happens I am in the mood today And last lastly a shipwreck coin, you don't often see them like this
Meaning no offense, @GDJMSP, the 1821 farthing looks a bit odd to me. I have never noticed Britannia having such chubby cheeks and childlike appearance. Perhaps all such coins I have seen were more worn than yours? I think I also have an 1821 farthing...let me see. An 1823 as well.
That one I used to own, as I no longer own any coins, was graded MS65 many years ago, back when the TPGs graded coins correctly. Today, it'd probably be a 67. But you are correct, the cheeks were quite chubby. And my pics did not do justice to the coin. The toning that appears dark in the pic was actually a beautiful bluish shade, much lighter colored in hand. But my skills could not quite capture it correctly.
Here is one of my favorite "modern" issues AV 4 Dukaten 1931 Belgrade Mint King Alexander I/ Queen Sophia of Yugoslavia Note: After Yugoslavia was created in 1918 at Versailles. The Serbs who were most responsible for WW1 were given large territories from the Austro-Hungarian Empire. The Serbian King now ruled Yugoslavia. Alexander an authocratic ruler, he was assasinated in Paris in 1934.