ASG Certifies Two Rare 1897 Red Revenue Stamps

ASG Certifies Two Rare 1897 Red Revenue Stamps

The high-grade examples of this stamp are among the rarer collectibles in Chinese philately. Learn more >

ASG Shanghai Offers 20,000 RMB Bonus for New Stamp Graders Hired

ASG Shanghai Offers 20,000 RMB Bonus for New Stamp Graders Hired

Apply today to join a growing global group of companies that certify collectibles. Learn More >

ASG Certifies Block of China’s Most Iconic Zodiac Stamp

ASG Certifies Block of China’s Most Iconic Zodiac Stamp

Issued in 1980, several factors make the Golden Monkey one of China's most popular stamps. Learn more >

Learn about the ASG Grading Scale

Learn about the ASG Grading Scale

ASG grades stamps according to an internationally accepted grading scale of 1 to 100. Learn more >

An expert and impartial stamp grading service from the people behind NGC, PMG and CGC. Subscribe for updates >

Verify ASG Certification

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What is ASG Certification Verification?

This tool can help you to verify that your ASG holder is genuine and has not been tampered with. It can also be a useful starting point to research your ASG-certified stamp.

Instructions

Enter a stamp's ASG certification number (circled in the image) to confirm its description and grade in ASG's database and, if available, view the images of the stamp taken by ASG.

Stamps We Grade

View the full listing of stamps we grade.

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How to Submit

Learn how to submit stamps to ASG for expert authentications and grading.

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News

Keep up with the latest news and announcements from ASG.

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