Il cavaliere, direi chiaramente di inizio XIV secolo (forse 1320) con guanto squamato, ha due spalletti rotondi con frange del tutto simili a quelle che vediamo sui legionari romani.
Andrea di Bologna (1350-1377 circa) ritrae san Michele alla romana

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Andrea de Bartoli (ca. 1350-1377)
L'Arcangelo Michele
14th century
tempera on panel
115*48 cm

may be from GALLERIA MORETTI
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THE GALLERIA MORETTI WAS FOUNDED IN 1999 BY FABRIZIO MORETTI. SITUATED IN THE HEART OF FLORENCE, BETWEEN PALAZZO STROZZI AND SANTA MARIA NOVELLA, THE GALLERIA MORETTI OPENED TO THE PUBLIC - AND TO MAJOR PUBLIC AND PRIVATE COLLECTORS - WITH THE INAUGURAL EXHIBITION, FROM BERNARDO DADDI TO GIORGIO VASARI, IMMEDIATELY DISTINGUISHING ITSELF WITH ITS SPECIALIZATION IN ITALIAN, AND ESPECIALLY TUSCAN, OLD MASTERS. FROM THEN ON, ART HISTORIANS OF INTERNATIONAL IMPORTANCE HAVE COLLABORATED ON NUMEROUS PROJECTS PUBLISHED BY THE GALLERY.
THE LONDON SEAT OF THE GALLERY, MORETTI FINE ART LTD, OPENED ON NEW BOND STREET IN JANUARY 2005 AS A POINT OF REFERENCE FOR COLLECTORS WHO SEEK A CONFIDENTIAL AND DISCREET APPROACH. IN DECEMBER 2011, THE GALLERY MOVED TO ST JAMES'S, IN THE NUCLEUS OF THE LONDON AND INTERNATIONAL ART MARKET.

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датировать костюм можно около 1370 - в это время наиболее часто встречаетя отдельная кираса поверх жупона, часто с бригандинным подолом, но не приклепанная к основанию (в данном случае видны ремни, удержиающие кирасу на месте)