Authentication, certification, and sale of autographed items

Appraisal, authentication, and sales since 2010.

Meet the expert

Mathias Meyer is a French autograph expert, active in the national and international market since 2010. He works with collectors, sellers, specialized stores, auction houses, and clubs through technical analysis, market valuation, and document certification of collectible items. He is a member of ILAB (International League of Antiquarian Booksellers), an international association that brings together recognized professionals in the rare books, manuscripts, and autographs market.

About Glórias
Descubra se seu item é autêntico, quanto vale e se vale a pena certificar Glórias | Autógrafos e Manuscritos Raros

Step 1 - What is your item worth? Can it be authenticated?

Ideal for those who want to know what they have in hand, out of curiosity or considering selling. It is also recommended for those who want to avoid mistakes when buying from strangers. If the analyzed elements are favorable, professional certification is a logical continuation of the process.

Request a PRE-EVALUATION

Step 2 - Professional certification of your item

Professional certification helps owners and collectors present their items in a more structured, documented, and transparent manner. It is suitable for those who wish to sell items in the national and international autographed memorabilia market, as well as for those who simply want to document and add value to a piece in their collection.

Request a CERTIFICATION

Examples of analyzed, certified, and sold parts

  • Mini boots signed by the 1958 Selection

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  • Large autographed portrait of Alberto Santos-Dumont (1919)

  • Autograph by Steve Wozniak (2003)

  • Handwritten letter from Carlos Gomes (1885)

  • Fashion drawing by Yves Saint Laurent (1960s or 1970s)

Certified items available for sale (from R$ 500 to R$ 120,000)

A selection of rare autographed items, chosen for their historical importance, provenance, and condition.

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Exceptional parts and assemblies (price on request)

  • Becoming Senna (in English)

    Two handwritten letters from Ayrton Senna to his best friend, totaling 25 pages, with previously unpublished drawings and photographs, dated 1979, document his time in European karting and the beginning of his journey towards Formula 1 at the age of 19.

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  • Alberto Santos-Dumont, le pionnier (in French)

    The most beautiful collection of manuscripts and photographs of Alberto Santos-Dumont brings together 30 decisive years of his life. These are rare and exceptional documents that reveal the aviation pioneer and also a man of great values. Introduction in French.

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  • Writings of the Empire

    This exceptional collection, spanning nearly a century of Brazilian Imperial history, offers an intimate and human glimpse into the lives of key figures such as Dom Pedro I, Dom Pedro II, and Princess Isabel, through handwritten letters, signed portraits, and previously unpublished drawings.

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  • Pelé 1958

    The most complete known autograph album of the Brazilian national team that won the 1958 World Cup, featuring signatures from legends such as Garrincha, Zagallo, and others, including one of Edson Arantes do Nascimento 's first signatures, writing 'Pelé'.

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  • Signed Jorge Amado

    Previously unpublished correspondence between Jorge Amado and Zélia Gattai and the Olinto couple, covering almost three decades of friendship: Jorge's daily life, the creative and editing process, adaptations for film and television, Afro-Bahian culture, and his relationship with Zélia.

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  • An unknown Mane-Katz

    This expressive portrait, discovered by chance in Brazil, is a previously unknown work attributed to Emmanuel Mané-Katz , depicting a man in a beret and blue scarf, possibly the artist Chaim Soutine . The painting is currently undergoing authentication.

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