Your Most Treasured

My 1861 0 Liberty Seated Half

Because of the history behind it, the turmoil at the New Orleans mint that year, having three different governments use the mint that year to produce the coins, etc.
Plus it looks good in my Dansco 7070

I guess I have my most treasured roll hunting finds first off... I can't pick "one" so I'll just do one per denomination:

This dime from a shattered die is easily my best:


I found this full-date 1921-S roll hunting, and gave it to my Brother for Christmas along with a nice Dansco to house his old collection from when we were kids:



I guess this 1980 DDO is my best cent find so far:


I have nothing to write home about for quarters or halves, and I'm not sure if I have a dollar that stands out much yet.

Among coins I've purchased, I think my 1926-S was the most challenging to find, though there are a lot of Mercury dimes I have that I'm very attached to:

Well, not spending more than $50 on a single coin so far kind of limits the possibilities :-)

Okay. The only coin I spent the $50 on (all others were under $40) was a silver rouble from 1818. Next to horrible condition, really (VG at best, probably less), so just about worth the money - and that mostly due to the sheer age.
That isn't my coin with the best numismatic value, though - this title goes to what was until very recently* my only US Large Cent - a 1841 cent in XF (well, I think it's XF - if I ever got it graded, I'm almost sure it won't grade higher than VF, due to all those rim dings and stuff). Paid $35 for it, and apparently it's worth $80 or so.
The coin that was probably my best gain in value over purchasing price was yet a third one: German 2 Rentenpfennig, 1923-J (bought for less than $1, value $20). Close second was a 1924 Soviet copeck (bought for just under $2, value $30).
But as the question is the coin I'm most proud of having, that would probably be a commemorative of the smallest country in the world to be exact, 1962 Vatican 50 lira commemorating the Second Vatican Council. Mintage only 200,000 by the way.



*) How it stopped being so is another interesting story - which I might even start a separate thread about, so weird it is - but completely unrelated to the topic of this thread, so I won't explain it now.

Until about a week ago it was my 1793 Wreath Cent but since I "adopted it out" to a new home, I now must say it's a toss-up between my fraternal twins. Either the 1795 Flowing Hair dollar or the 1795 Draped Bust dollar.

I have to choose just one?

I do not think I can do it, so I will just have to see what everyone else has to offer.

For me, it's a combination of a $6 bargain for a 1964 Kennedy half dollar Proof, Accented Hair variety...




And an error that took me forever to find the right specimen, a 1964 Clipped Kennedy half... Which lost the 4 in the date due to the clip, yet is recognizable because of the lack of a clad layer...




They are in no means my most expensive coins, but the coins that utterly blow me away...

Darth Anarchus: It is still possible to accurately assess the weight of a clipped 90% '64, but some careful measurement is needed.