The 1950-S/D Washington Quarter is worth anywhere from $8 in heavily circulated condition to well over $500 in high mint state grades — and if you happen to have one with a rare mint mark error, you could be sitting on something truly special.
If you pulled one of these quarters out of an old coin jar or inherited a collection, you’re in the right place. This guide will walk you through exactly what this coin is, why the “S/D” designation matters, and how to figure out what yours might be worth.
What Is the 1950-S/D Washington Quarter?
The 1950-S/D Washington Quarter is one of the most talked-about error coins from the mid-20th century. The “S/D” designation means that a “D” (Denver) mint mark was punched into the die first, and then an “S” (San Francisco) mint mark was punched on top of it. The result? A coin that shows traces of both mint marks — and that kind of error makes collectors take notice.
This isn’t just a quirky curiosity. Repunched and overmint mark errors are highly sought after in the numismatic world because they represent a visible mistake in the minting process. The 1950-S/D is confirmed by major grading authorities, making it a legitimate collectible rather than a damaged coin.
If you’re not sure whether your coin has this feature, a free coin identifier app can help you get a quick first look before you take it to a professional. Tools like CoinKnow are especially handy for beginners who want instant results from a smartphone photo.
How to Identify the S/D Overmintmark on Your Quarter
Spotting the S/D overmint mark requires a good magnifying glass or loupe — at least 5x magnification. Look closely at the mint mark area on the reverse of the coin (near the bottom, just above “QUARTER DOLLAR”). You should see a hint of a “D” shape beneath or around the “S.”
The lines won’t be perfectly clean. You might notice a slight doubling or an irregular curve in the lower portion of the mint mark. That’s what you’re looking for.
If it’s hard to tell with the naked eye, don’t worry. Many collectors use digital microscope attachments or coin imaging apps like CoinKnow to zoom in and get a cleaner picture. The clearer the overmint mark, the more confident a buyer or grading service will be — and that confidence directly affects the coin’s value.
1950-S/D Washington Quarter Value by Grade
Condition is everything in coin collecting. A heavily worn coin and a pristine uncirculated one can differ by hundreds of dollars. Here’s a general breakdown of what the 1950-S/D Washington Quarter is worth at different grade levels:
| Grade | Description | Estimated Value |
|---|---|---|
| G-4 (Good) | Heavy wear, major details visible | $8 – $15 |
| VF-20 (Very Fine) | Moderate wear, clear design | $25 – $60 |
| EF-40 (Extremely Fine) | Light wear on high points | $75 – $130 |
| MS-63 (Uncirculated) | No wear, some contact marks | $200 – $350 |
| MS-65 (Gem Uncirculated) | Sharp strike, minimal marks | $450 – $600+ |
For more detailed grade-by-grade pricing, you can browse current market prices for the 1950 Washington Quarter in mint state to see how auction results have trended over time.
What Makes This Coin More or Less Valuable
Beyond grade, several factors influence how much a buyer will pay for your 1950-S/D quarter.
The clarity of the overmint mark is a big one. A boldly visible “D” beneath the “S” will fetch more than a faint or questionable example. Eye appeal also matters — a coin with good luster and no cleaning will always outperform one that’s been polished or dipped.
Third-party grading from services like PCGS or NGC adds significant credibility and can increase resale value by 20–40% in some cases. Collectors pay a premium for slabbed coins because there’s no guessing about the grade.
If you want a comprehensive look at what your 1950 Washington Quarter is worth based on condition and mint mark variety, that resource breaks things down in plain language that any coin hunter can follow.
Should You Get It Graded or Sell It As-Is?
This depends on what condition your coin is in. If it looks like it was barely circulated and the overmint mark is strong, professional grading is worth the investment. Submission fees typically run $20–$50 per coin, so make sure the potential upside is there before you spend the money.
If your coin is well-worn and the S/D detail is barely visible, selling it as a raw coin to a dealer or on eBay might be the simpler route. Either way, knowing your coin’s identity and approximate value is step one — and apps like CoinKnow make that first step easy and free.
FAQ
Q: How do I know if my 1950 quarter has the S/D overmint mark?
A: Look at the mint mark on the reverse of the coin under magnification. If you see traces of a “D” beneath or overlapping the “S,” you likely have the S/D variety. A coin identifier app or a local coin dealer can help confirm it.
Q: Is the 1950-S/D Washington Quarter rare?
A: It’s not extremely rare, but it’s scarce enough that collectors actively seek it out. High-grade examples in MS-65 or above are genuinely hard to find, which is why they command premium prices.
Q: Where is the best place to sell a 1950-S/D Washington Quarter?
A: Options include eBay, coin shows, and established dealers like APMEX or local numismatic clubs. If your coin is graded by PCGS or NGC, online platforms like Heritage Auctions tend to deliver the strongest prices.
