https://freemwiki.com/index.php?action=history&feed=atom&title=Openai%2F6928c8bd-a418-800a-b930-04098eeef67aOpenai/6928c8bd-a418-800a-b930-04098eeef67a - Revision history2026-04-25T02:21:38ZRevision history for this page on the wikiMediaWiki 1.43.3https://freemwiki.com/index.php?title=Openai/6928c8bd-a418-800a-b930-04098eeef67a&diff=593771&oldid=prevLukegao: by freem.ai...2025-11-28T05:24:36Z<p>by freem.ai...</p>
<p><b>New page</b></p><div><br />
{{DISPLAYTITLE:Philadelphia mint mark P}}<br />
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''This conversation was exported from ChatGPT''<ref>{{cite web|title=Philadelphia mint mark P|url=https://chatgpt.com/share/6928c8bd-a418-800a-b930-04098eeef67a|publisher=ChatGPT|access-date=2025-11-28}}</ref><br />
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== gpt-5-1 ==<br />
=== User: When and what coins did the Philadelphia Mint put a mint mark on coins with a “P?” ===<br />
When and what coins did the Philadelphia Mint put a mint mark on coins with a “P?”<br />
<br />
=== Assistant: Here’s the complete, accurate timeline of when the Philadelphia Mint used the “P” mint mark, and on which coins. ===<br />
Here’s the complete, accurate timeline of when the Philadelphia Mint used the “P” mint mark, and on which coins.<br />
Philadelphia normally struck U.S. coins without a mint mark, so anytime you see a “P”, it’s a special case.<br />
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=== ✅ Full History of the “P” Mint Mark ===<br />
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!https://www\.fcmint\.com/pub/media/catalog/product/cache/afad95d7734d2fa6d0a8ba78597182b7/r/a/rare\_p\_mint\_marks\_wallet\_1200\.jpg<ref>{{cite web|title=https://www\.fcmint\.com/pub/media/catalog/product/cache/afad95d7734d2fa6d0a8ba78597182b7/r/a/rare\_p\_mint\_marks\_wallet\_1200\.jpg|url=https://www.fcmint.com/pub/media/catalog/product/cache/afad95d7734d2fa6d0a8ba78597182b7/r/a/rare_p_mint_marks_wallet_1200.jpg|publisher=fcmint.com|access-date=2025-11-28}}</ref><br />
!https://i\.usacoinbook\.com/us\-coins/1980\-lincoln\-memorial\-cent\.jpg<ref>{{cite web|title=https://i\.usacoinbook\.com/us\-coins/1980\-lincoln\-memorial\-cent\.jpg|url=https://images.openai.com/static-rsc-1/g-6TcHZ1chb5gB_B5iIphq340nrmr3U5PWJRmFWBWLijNtF6JZBXkbJOeYmrRcNHYUY7sEtQjGeR8XmiGPEO5fxda9VsR2x3bdlVDgAZZzpUp4i-DnCaFPkuUZsCYYkpBwtONRFH8G3hF42qSErq2A|publisher=images.openai.com|access-date=2025-11-28}}</ref><br />
!https://profilecoins\.com/cdn/shop/products/442R\.AC\-rev\.jpg?v=1697045122&width=2048<ref>{{cite web|title=https://profilecoins\.com/cdn/shop/products/442R\.AC\-rev\.jpg?v=1697045122&width=2048|url=https://images.openai.com/static-rsc-1/OGlkIyfBvyAH039pSA_llxV3yMAzqqWvCHkInZHwJUy_pHiBcKqGNH7iUZgD_UHTibKduP8o68rgGk1shFJGZ3baGM4BdkXpAl3sjuPMTo0uu_UjCcbuQdbYeDyb3bwyg8LQ7pknSTsqyUQuUI0Dfw|publisher=images.openai.com|access-date=2025-11-28}}</ref><br />
5<br />
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=== 🕰️ 1. WWII Silver Nickels (First Ever “P”) — 1942–1945 ===<br />
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Coins: Jefferson “Wartime” Nickels<br />
Mint mark location: Large letter above Monticello<br />
* 1942 (silver type only)<br />
* 1943<br />
* 1944<br />
* 1945<br />
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This was the first time in U.S. history Philadelphia used a mint mark.<br />
Reason: to identify the special 35% silver alloy during wartime.<br />
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=== 🕰️ 2. Susan B. Anthony Dollars — Since 1979 ===<br />
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Coins: SBA Dollars (1979–1981, 1999)<br />
Mint mark location: Left of the portrait<br />
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Starting in 1979, Philadelphia put its “P” on the new dollar coin because the design needed clear mint identification.<br />
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=== 🕰️ 3. All Denominations Except Cents — Since 1980 ===<br />
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Coins:<br />
* Nickel (Jefferson) – P appears starting 1980<br />
* Dime (Roosevelt) – P appears starting 1980<br />
* Quarter (Washington) – P appears starting 1980<br />
* Half Dollar (Kennedy) – P appears starting 1980<br />
* Dollar Coins (SBA, Sacagawea, Presidential, Native American, Innovation dollars) – always include P when struck in Philly<br />
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Before 1980, Philadelphia put no mint mark on these coins.<br />
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=== 🕰️ 4. A One-Year Special: The Lincoln Cent “P” — 2017 Only ===<br />
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Coins: Lincoln Shield Cent<br />
Mint mark location: Standard position below the date<br />
<br />
In 2017, for the U.S. Mint’s 225th Anniversary, Philadelphia added a “P” to cents for the first and only year ever.<br />
* 2017 cents are the only Lincoln cents in history with a P mint mark.<br />
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=== 🕰️ Summary Table ===<br />
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| Denomination | First Year With “P” | Notes |<br />
| ------------------------------ | ------------------- | -------------------------------- |<br />
| Nickel (WWII silver) | 1942–45 only | Special war alloy |<br />
| Dollar coins | 1979 | SBA, then all later dollars |<br />
| All regular coins except cents | 1980 | Nickels, dimes, quarters, halves |<br />
| Lincoln cent | 2017 only | Anniversary issue |<br />
<br />
If you want, I can also show:<br />
* Which coins should never have a P (so you can spot errors)<br />
* Values of P-mint coins you have<br />
* Photos of the mint mark positions on each denomination<br />
<br />
== References ==<br />
<references /><br />
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<br />
[[Category:ChatGPT Shares]]<br />
[[Category:openai]]</div>Lukegao