Services we Provide

Coin Reports

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The ultimate combination of provenance research and Condition Census listings.

Coin Search

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Desiring a coin and finding it are two different stories. We know where many of the top coins are located and we can help you find that special coin.

Purchase & Sales Negotiation

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We can represent you in buying and selling negotiations at all levels.

Provenance Research

It's critical to know the history of the coin you are about to purchase or sell.

Prior Ownership

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Famous pedigrees are frequently omitted, lost, or forgotten. Our research adds value by re-linking coins to famous (and not-so-famous) collections.

Grade History

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Grades on individual coins do go up (frequently) or down (rarely) and they can vary from one service to another. We provide you with the unvarnished history of the coin you are about to buy or sell.

Price History

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We arm you with up-to-date, comparable sales prices so you can make data-driven decisions when buying or selling.

Condition Census Listings for...

Individual Coins

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Our rankings show where your coin fits among the finest examples.

Coin Types

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We offer the only Condition Census rankings available for type coins.

Contact Us

Ron Guth, Chief Investigator

4640 Cass Street #9142, San Diego, CA 92169, United States

ron@numismaticdetectives.com (858) 220-5775