CFA CFA Manufacturer & Proof Marks 1 — Questions and Answers
Question 1: What is the primary purpose of a proof mark on a firearm?
- To identify the country of manufacture for import duty assessment
- To certify the firearm has been tested and meets minimum safety standards (Correct answer)
- To indicate the firearm's original retail price
- To track the firearm's chain of ownership
Correct answer: To certify the firearm has been tested and meets minimum safety standards
Proof marks certify that a firearm was tested under controlled conditions and meets the safety standards of the proofing authority that applied the mark.
Question 2: The Birmingham Proof House and the London Proof House are both located in which country?
- Germany
- Belgium
- United States
- United Kingdom (Correct answer)
Correct answer: United Kingdom
Both the Birmingham Proof House (est. 1813) and the London Proof House (est. 1637) are located in England, United Kingdom, and remain active today.
Question 3: The 'ELG' proof mark stamped in an oval with a star is associated with which European proofing authority?
- Essen, Germany
- Liège, Belgium (Correct answer)
- Lyon, France
- Lisbon, Portugal
Correct answer: Liège, Belgium
The ELG (Épreuve de Liège) mark in an oval with a star is the primary proof mark of the Liège Proof House in Belgium, one of the world's oldest and most prolific proofing authorities.
Question 4: What does a 'nitro proof' mark on a firearm indicate?
- The firearm was manufactured with a nitrogen-based steel alloy
- The firearm has been tested and approved for use with smokeless powder (Correct answer)
- The barrel has been chrome-lined for corrosion resistance
- The firearm was manufactured before smokeless powder was invented
Correct answer: The firearm has been tested and approved for use with smokeless powder
A nitro proof mark confirms the firearm was tested with smokeless (nitrocellulose-based) powder and is safe for modern ammunition, distinguishing it from earlier black-powder-only proved firearms.
Question 5: Under the C.I.P. (Permanent International Commission for the Proof of Small Arms) treaty, proof marks from member countries are:
- Only valid within the issuing country
- Mutually recognized by all member countries (Correct answer)
- Required to be re-proofed before any sale
- Valid only for military procurement
Correct answer: Mutually recognized by all member countries
C.I.P. member countries mutually recognize each other's proof marks, so a firearm proofed in Belgium is accepted as safely tested in Germany, the UK, and all other C.I.P. member nations.
Question 6: What does a 'reproof' mark on an antique firearm that has been converted or altered indicate?
- The firearm is now illegal to sell commercially
- The firearm was re-tested after modification and passed current safety standards (Correct answer)
- The firearm failed its original proof test
- The firearm has been refinished by the manufacturer
Correct answer: The firearm was re-tested after modification and passed current safety standards
A reproof mark certifies that an altered or converted firearm underwent new safety testing after modification and passed the proofing authority's current standards.
CFA CFA Manufacturer & Proof Marks 1
What is the primary purpose of a proof mark on a firearm?