What single date and mint mark coin do you own the most of in your collection?

For me it is 1938-D buffalo Nickels in PCGS MS66 or better,,,, I have 30 pcs. ------- I forgot to add that they all have CAC Stickers.
Here is one I have a True-View of:
GrandAm 

6
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1921 Philly Morgan
Keep going until you have a roll of 40
Www.killermarbles.com
Www.suncitycoin.com
1967 SMS Birth Year Set (five coins) plus one Lincoln Toner (six total)
BST transactions: dbldie55, jayPem, 78saen, UltraHighRelief, nibanny, liefgold, FallGuy, lkeigwin, mbogoman, Sandman70gt, keets, joeykoins, ianrussell (@GC), EagleEye, ThePennyLady, GRANDAM, Ilikecolor, Gluggo, okiedude, Voyageur, LJenkins11, fastfreddie, ms70, pursuitofliberty, ZoidMeister,Coin Finder, GotTheBug, edwardjulio, Coinnmore, Nickpatton, Namvet69,...
A bunch of 1903-O Morgan Dollars mostly PCGS MS65.
Unc 3pc. Bicentennial Silver, have 8 sets.
POST NUBILA PHOEBUS / AFTER CLOUDS, SUN
Love for Music / Collector of Dreck
1868 shield nickel. No mintmark!
http://www.shieldnickels.net
I have 4 1943 P Walkers. A certified MS 67 and 3 raws ones (2 AUs and a BU).
1941 P, 1942 P, 1942 S, 1944 D, 1937 P & 1935 P WLHs all deserve honorable mention.
Sometimes, it’s better to be LUCKY than good. 🍀 🍺👍
My Full Walker Registry Set (1916-1947):
https://www.ngccoin.com/registry/competitive-sets/16292/
2017 P Lincoln Cent. 2500 coins right at the moment.
Real coin is 1916P Mercury Dime. 30 to 40 of them with the highest grade PCGS MS66FB. About half are graded and the other half raw. All MS coins in my opinion.
Ken
1922 toned Peace $ in various MS grades...
I have a few of these but it is more about I try not to hoard duplicates

11.5$ Southern Dollars, The little “Big Easy” set
1909.

--Severian the Lame
1878-CC, 1880-CC, 1882-CC, 1883-CC & 1884-CC Morgan Dollars & Well-Struck 1921 Peace Dollars
Stuart
Collect 18th & 19th Century US Type Coins, Silver Dollars, $20 Gold Double Eagles and World Crowns & Talers with High Eye Appeal
"Luck is what happens when Preparation meets Opportunity"
I was a little surprised myself to learn the answer. For me, the one single date and mint mark coin that I own the most of is 1839-O half dime, with 53 pieces in my reference collection. Without counting, I would have guessed the 1840-O, but that was second at 46 examples.
Once again I was surprised. The one single date and mint mark coin that I own the most of is actually the 1832 (P), with 63 examples. Interesting question, and one that can teach us all something about our own collections. [For some reason I could not edit the above reply].
Probably 1958, no mintmark.
For a few years a long time ago, I couldn't seem to pass up a nicely toned half or quarter, or sometimes dime
Liberty: Parent of Science & Industry
1911 $2 1/2 Indian. Probably over 100 of them. Here are a few of them:

I have a hoard of 1946 Booker T. Washington commems.
1806 HE


'dude
Either 1949-S dimes or 1853 quarters, roughly 10-12 of each
1878 Morgan dollars.
Keeper of the VAM Catalog • Professional Coin Imaging • Prime Number Set • World Coins in Early America • British Trade Dollars • Variety Attribution
1956-D pennies. I once had 1500 of them but now only have about 10.
Whoever is careless with the truth in small matters cannot be trusted with important matters.
I have a roll of 1933 $20's. Don't tell anyone.
F> @jwitten said:
That is sick!
2008-W - multiple sets of unc and proof Buffalos, a set of proof and unc as well as multiple $25 and $50 Platinum Eagles, multiple proof and unc Jackson Liberty Spouses and a single $10 AGE all purchased soon after joining the forum thanks to Eric's epic thread on Modern's
A few years back I bought a bunch of original, solid date/mm BU Morgan rolls stashed away from the early 1970's. There's multiple duplicate rolls of 1885, 1886, 1887, 1880-s, 1881-s, 1882-s, etc. So I'd say 60+ choice BU specimens on some of those dates.
I have a few dozen Banco Mexico wrapped rolls of 1985-1986 solid dated 1 oz silver Libertads. Must be 60-100 each of those.
I once owned a whole roll of '32-D's that I bought from a Denver dealer. Now I have about 5 of these.
Whoever is careless with the truth in small matters cannot be trusted with important matters.
No doubt-1913 Var 1 Buffs.
1909....of the copper Lincoln variety.
Imagine because I started collect Lincoln cents first AND the S VDB is the king of the series.
As I actively seek excellent examples of Lincoln cents to this day (do not have to be UNC to be considered "excellent examples"), it seems that I have several 1909 dated Lincolns of several varieties.
Six 1859 Half Dimes from Philly in a range of grades. It's my favorite. A one year type with hollow stars that only the Philly strikes have.
Great transactions with oih82w8, JasonGaming, Moose1913.
Should be 1829 capped bust half dime
I.have a roll of MS 1958, 1955 and 1964 D quarters, 40 coins each. I also have numerous 1964 and 1962 Cameo proof half dollars.
64 P Kennedy's ...... at least $100 face but all treated as junk silver
Successful trades.... MichaelDixon,
Probably 1922 Peace or 1964 Kennedy
Collector, occasional seller
For some odd reason century coins caught my fancy at one time. I believe I still have a number of 1900 silver dollars. Another date that I used as a basis for collecting early era U.S. coins was 1830 as it was of historical significance to me.
This looks much better than most of the 66s out there. It wouldn't look out of place in a 67 holder.
The question asked for the date and mint mark, so I guess it can extend across multiple denominations.
I have a mini hoard of at least a dozen 1942 proof coins (Philadelphia) with at least four designated cameo coins (dime, half, 2x cent) and more than a dozen with significant frost that are either raw or just miss a designation (mostly halves and dimes).
Serendipity or intentionally? If the latter, does this issue have any particular significance? Very neat either way...
Actually it is a MS66+ and yes I might try to upgrade it at some point.
I have a couple of rolls of '43 cents...no idea of MM since I have never opened them....Outside of rolls it is probably some date of Buffs, I have a lot of them...Also three or four rolls of 2000 Sacs.... Just too much effort to go through my collection to check for details.... Need a very cold winter week to do something like that
Cheers, RickO
Couldn't really say with complete accuracy. For moderns it's most likely 1959-D Jefferson nickels. It must have been a long, long, search to find the right one. I also have lots (too many) of 1834 Lettered Edge Capped Bust halfs. All the coins in that series were minted in Philadelphia. It's a very common date. Most of mine are in very low grades with issues. Probably picked them out of the bargain bins when I was very young and oh so poor. Just don't remember for sure where they all came from. I do know that they must have been very inexpensive,......like cheap.
2005 proof sets no doubt. Went crazy thinking the new buffalo nickle was going to be something. Was just getting active again in numismatics and was on the early part of the learning curve.
CORRECTION ALERT!!!! What was I thinking? For me, like Coinsponge, it is the 2005 Bison nickel. Philadelphia mint, uncirculated in original bank rolls. I picked them up at a bank in Paducah, Kentucky to use as change for the business. I bought two boxes of nickels. How many is that??? When I opened the boxes they were all new uncirculated rolls. I'm a nickel nut. I was happy so I saved them and put them away. I only opened two or three of the rolls.......until about six months ago. What a difference eleven years can make. They basically ALL developed those horrid black (carbon?) spots. I've been releasing them into the wild but I still have lots and lots and lots and...............
1876-P Trade Dollars. Love all the varieties but some maybe too much. It's a sickness.
Date and mintmark... hmmmm
I'd have to say it is 1971s. Cameos and dcams for all denominations, but lots of varieties.
“In matters of style, swim with the current; in matters of principle, stand like a rock." - Thomas Jefferson
My digital cameo album 1950-64 Cameos - take a look!
I have dozens of rolls of steel cents, and later date BU Lincoln cents from a large estate I purchased years ago.
Now if you are talking coins I specifically purchased because of the coin and date, 1839 large cents, probably around 10. Of course there are 5 different major varieties, and dupes of all except the 39/6.
1956-D pennies. I once had 1500 of them but now only have about 10.
_Serendipity or intentionally? If the latter, does this issue have any particular significance? Very neat either way...
It was an experiment.
I bought accumulations of these from dealers on ebay. i was looking mainly for 1956 D/D. i found 4 of these out of 1500 coins. From these numbers i determined that only about 4 million out of over 1 billion 1956 D pennies made are D/D's,RPM 1.
Another cool 1956-D/D penny error is 'shadow D above D'. Didn't find a single one of these though.
Whoever is careless with the truth in small matters cannot be trusted with important matters.
I have about thirty 1806 half dollars, used to have more but sold some dupes. No stickers, got 'em before the sticker craze, many are raw and don't have grades.
I no longer have any coins with mint marks.
Does a bag full of 1976 Ikes count?
If you're talking coins with a bit of numismatic value, probably 1922 Peace dollars. If you're talking slabbed, it's certainly 1921 Peace dollars, but not so many as you might think.
2017 uncirculated P penny. Got 5000 of them from the bank. Consider it, a "cheap" win for me in quantity wide.
__2017 uncirculated P penny. Got 5000 of them from the bank. Consider it, a "cheap" win for me in quantity wide.
You are lucky.i asked at the bank about obtaining some new pennies,2017-D's,maybe a box of 2500.Was told they never get quantities like that of new pennies even though the Denver mint not that far away.Go figure.
Whoever is careless with the truth in small matters cannot be trusted with important matters.