The 1966 Washington Quarter: Hidden Value & Rare Varieties

While most 1966 quarters are worth face value, certain rare varieties and mint errors can be worth 50to50to5,000+. This guide reveals exactly what makes some 1966 quarters valuable and how to identify them in your pocket change.

Key Factors That Increase Value

1. Special Mint Set (SMS) Quarters

• Characteristics:
  • Frosted devices on mirror-like fields
  • Sharper strike than regular circulation coins
  • Often mistaken for proofs (but no proofs were made in 1966)
• Value Range:
  • MS65: 5−5−10
  • MS67: 50−50−100
  • MS68: 500−500−1,000 (extremely rare)

2. Doubled Die Varieties

• 1966 DDR (Doubled Die Reverse)
  • Shows doubling on eagle’s wings and olive branches
  • Values: 300−300−1,500 depending on grade
• 1966 DDO (Doubled Die Obverse)
  • Doubling visible on Washington’s hair and “IN GOD WE TRUST”
  • Values: 500−500−5,000 for strong examples

3. Off-Center Strikes

• Partial collar errors (showing a “railroad rim”)
  • Worth 25−25−150 depending on severity
• 10-50% off-center strikes
  • Values range from 50−50−500

How to Identify Valuable 1966 Quarters

Step 1: Check the Mintmark

• No mintmark = Philadelphia
• “D” = Denver
• No “S” mint coins were made in 1966

Step 2: Surface Inspection

• Look for:
  • Mirror-like surfaces (SMS coins)
  • Doubling on lettering or devices
  • Unusual rim formations
• Avoid:
  • Cleaned or polished coins
  • Environmental damage

Step 3: Weight & Measurement

• Should weigh: 5.67 grams
• Diameter: 24.3 mm
• Deviations may indicate errors

Grading & Value Chart

Where to Sell Valuable 1966 Quarters

1. Heritage Auctions (for error coins worth $1,000+)
2. eBay (best for SMS coins and minor errors)
3. Local Coin Shops (for quick sales of mid-range coins)

Pro Tip: Always get PCGS or NGC certification for coins that might be worth over $500.

Free Professional Evaluation

Think you have a rare 1966 quarter? Email clear photos to:
📧 quarters@pennyverse.info
Subject: “1966 QUARTER CHECK”

We’ll provide:
✔ Free authenticity verification
✔ Current market valuation
✔ Best selling options