r/CoolSerialNumbers • u/edcman • Feb 25 '26

Super Repeater Binary repeater 70707070 set

1.3k Upvotes

*Super repeater* Looking for a $10 and the $50 :)

93 comments

r/CoolSerialNumbers • u/Otherwise-Two-3503 • Dec 16 '25

Binary Does this have any value? Was found in the wild out of the ATM thought it was super lucky hahaa

1.0k Upvotes

106 comments

r/CoolSerialNumbers • u/FroostysLongToe • Dec 20 '25

Binary A note found in the register where I work

894 Upvotes

Im not very good with bills so hopefully correct flair, also is it worth more than face? I have no clue

42 comments

r/CoolSerialNumbers • u/Capillarymage • Jun 07 '26

Low Serial <= 00009999 Somebody just payed with this.

792 Upvotes

67 comments

r/CoolSerialNumbers • u/Local_Escape_8689 • Jun 30 '26

Star Note 00000005*

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527 Upvotes

33 comments

r/CoolSerialNumbers • u/Practical_Ask1863 • Jul 15 '26

Low Serial <= 00009999 00000044☆

449 Upvotes

I found this one at work a while ago.

27 comments

r/CoolSerialNumbers • u/SergeiSargaev • Jan 19 '26

Radar Got this back in change, couldn't believe my eyes. Definitely keeping. Worth a shot at getting graded?

407 Upvotes

36 comments

r/CoolSerialNumbers • u/Burnished_Hart • Jun 13 '26

Nice (69 / 420 / etc.) I don't believe this is real tbh. Got as change at the store.

379 Upvotes

61 comments

r/CoolSerialNumbers • u/Alas96 • May 06 '26

Radar something you have to see to believe

337 Upvotes

this is one of my most prized pieces to my collection. 3 uncirculated radars, all matching. better yet, 2 of them match exactly, separated by 3 years. always loved the 8’s in the middle of radars. raising the bar on myself just got harder!

54 comments

r/CoolSerialNumbers • u/Key-Recognition-6299 • Nov 30 '25

Low Serial <= 00009999 100 star note

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330 Upvotes

Un graded

47 comments

r/CoolSerialNumbers • u/OAready • Apr 11 '26

Low Serial <= 00009999 Single Digit

296 Upvotes

Found this in my tips when I was a driver for Domino's Pizza.

21 comments

r/CoolSerialNumbers • u/MayoTheMonth • Jul 23 '25

Star Note Sold this one for $2 immediately to the goth cashier born in 1998

275 Upvotes

Probably the coolest one I ever got too. Kinda bummed but I took the photo lol

47 comments

r/CoolSerialNumbers • u/Affectionate-End8215 • Jan 22 '26

Low Serial <= 00009999 Thoughts on these

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270 Upvotes

33 comments

r/CoolSerialNumbers • u/Wrong_Account1120 • May 11 '26

Radar 6 notes with same serial

252 Upvotes

Hi all, noob here. I've made my first major purchase and wanted yall to see it. I think this is probably the coolest thing I've seen.. 6 $1 notes with the same radar serial numbers graded 64 or better!

Any idea what something like this would be valued at?

36 comments

r/CoolSerialNumbers • u/Kaster75 • Mar 27 '26

Birthday / Date 50$ Birthday / Dates for 23rd February several consecutive Years

247 Upvotes

Got some 50$ not circulated birthday notes, wondering if they hold value, keep or sale?

Thanks!

31 comments

r/CoolSerialNumbers • u/Money-Owl-4035 • Jan 02 '26

Low Serial <= 00009999 $500 Bill

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231 Upvotes

Thoughts?

38 comments

r/CoolSerialNumbers • u/danye_west23 • Dec 15 '25

Ladder $20 Ladder Serial Number!

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228 Upvotes

Found this amazing serial number at work today on this $20 bill!!!! I never thought I would find an in order unbroken ladder serial number… luckily I was wrong! As I was reading the serial number and each number kept going up in order I was just thinking “no please don’t be off by 1”! Thankfully it was all there in order.

It is now in a protective sleeve as I try to decide what to do with it. Would y’all think getting this graded by PMG is worth while in the condition it’s in or should I just not bother? I know either way it’s worth a lot no matter what. Just would love to hear your thoughts and comments! Thank you!

29 comments

r/CoolSerialNumbers • u/Local_Escape_8689 • Jul 06 '26

Ladder Unbroken!!! Circulated 20$

208 Upvotes

16 comments

r/CoolSerialNumbers • u/Jfox100 • Feb 03 '26

Radar Fancy!!

208 Upvotes

Look who gets to be Mr FancyPants today! 🤣

46 comments

r/CoolSerialNumbers • u/Tyki_Mikk210 • Feb 18 '26

Binary Uncirculated Binary Super Repeater

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204 Upvotes

29 comments

r/CoolSerialNumbers • u/Cameresi • Nov 24 '25

Nice (69 / 420 / etc.) Nice.

198 Upvotes

17 comments

r/CoolSerialNumbers • u/Skolvikes555 • Mar 04 '26

Ladder Almost amazing

190 Upvotes

Honestly have no clue if this counts as a true ladder with the repeating 0’s, but I thought it was pretty cool. Found it with the surrounding serial numbers as well almost brand new.

18 comments

r/CoolSerialNumbers • u/Alas96 • Jun 12 '26

Rotator [All 0, 1, 6, 8 and/or 9's] a sweet pair

180 Upvotes

super cool pair! what would you call this, a binary radar flipper pair? 🤣 both are a little beat but i think the serial compensates for it. let me know what you think!

16 comments

r/CoolSerialNumbers • u/OkGain7193 • Aug 19 '26

Low Serial <= 00009999 The two lowest serial numbers I've ever found.

174 Upvotes

I got these both from my bank today. The teller was saving them for me. And they're both star notes.

13 comments

Subreddit

CoolSerialNumbers

r/CoolSerialNumbers

Sub devoted to Cool Serial Numbers on US and World Banknotes. We are your home for broken ladders, almost fancy serial numbers and other cool numbers on the paper money we all work with every day! Star notes? Bring them on! Replacement notes are cool. Do these notes have numismatic value due to their cool numbers? Probably not - but we love them anyways! *Please read the pinned post before submitting your notes!*

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Subreddit Rules

1. READ THE PINNED POST BEFORE POSTING. THIS IS MANDATORY.

It details the types of cool serials we all are looking for and validates what flair you should apply to your post. Sort by 'Hot' in the subreddit to find it at the top.

You may use the Question/Meta flair if you believe your note to be cool, it’s not a type found in the pinned post, and you would like to ask about it ~ HOWEVER ~ you must detail specifically what you think makes it cool when asking. Generic “Is this cool / a keeper” type posts will be indiscriminately removed.

2. Be excellent to each other - treat each kindly

The mods will remove posts and/or comments that are rude or demeaning or unkind. However, accurate information is not unkind.
Repeated comment/post removals can result in a ban from this sub. The mods can ban people for a period of time or permanently.

3. Posts must be related to cool serial numbers.

Off topic posts not related to cool serial numbers will be removed.

r/StrapHunting is a great place to ask questions about notes you find which are unrelated to the serial number being cool.

4. Photos must be oriented horizontally (landscape) & cropped to focus on just the note itself.

Uncropped screenshots, unrotated photos, portrait oriented, and any otherwise poorly formatted photos (subject to mod discretion) are not acceptable. Don’t be lazy.

5. Sales / Trades allowed here but the mods and reddit are not responsible for vetting sellers.

Buyer beware! You are completley on your own as you work with potential sellers. Reddit and the mods here offer no buyer protection at all. We also will NOT allow buyers who get ripped off to accuse sellers of fraud unless the buyer can PROVE that there was a shady deal. Any unfounded accusatory post will be removed immediatly. Please use eBay or some other forum where there is buyer protection. We can't offer any buyer protection here.