An electro-optic element (100a; 100b), comprising: a first substrate comprising: a first surface , a second surface , and a first electrically conductive portion and a second electrically conductive portion disposed on the second surface , a first isolation area electrically insulating the first electrically conductive portion and the second electrically conductive portion ; a second substrate comprising: a third surface , a fourth surface , and a third electrically conductive portion and a fourth electrically conductive portion disposed on the third surface , a second isolation area electrically insulating the third electrically conductive portion and the fourth electrically conductive portion ; a primary seal between the second and the third surfaces, wherein the primary seal and the second and the third surfaces define a cavity; an electro-optic medium disposed in the cavity; a spectral filter portion positioned between the first substrate and the primary seal to mask the primary seal when being viewed from the first surface ; further spectral filter portions positioned between the first substrate and the primary seal to mask the primary seal when being viewed from the first surface ; wherein the spectral filter portions contain opaque or mirror-like constituents with low optical transmissivity and the spectral filter portions define and surround a viewable portion of the electro-optic element (100a; 100b) when being viewed from the first surface ; and an indicia being in the viewable portion and being disposed between the electro-optic medium and the second surface of the first substrate ; characterized in that the indicia is an identifier that indicates data related to the electro-optic element (100a; 100b) and is small or thin enough such that it is not perceptible or readily noticable by the human eye. a first substrate comprising: a first surface , a second surface , and a first surface , a second surface , and a first electrically conductive portion and a second electrically conductive portion disposed on the second surface , a first isolation area electrically insulating the first electrically conductive portion and the second electrically conductive portion ; a second substrate comprising: a third surface , a fourth surface , and a third electrically conductive portion and a fourth electrically conductive portion disposed on the third surface , a second isolation area electrically insulating the third electrically conductive portion and the fourth electrically conductive portion ; a third surface , a fourth surface , and a third electrically conductive portion and a fourth electrically conductive portion disposed on the third surface , a second isolation area electrically insulating the third electrically conductive portion and the fourth electrically conductive portion ; a primary seal between the second and the third surfaces, wherein the primary seal and the second and the third surfaces define a cavity; an electro-optic medium disposed in the cavity; a spectral filter portion positioned between the first substrate and the primary seal to mask the primary seal when being viewed from the first surface ; further spectral filter portions positioned between the first substrate and the primary seal to mask the primary seal when being viewed from the first surface ; wherein the spectral filter portions contain opaque or mirror-like constituents with low optical transmissivity and the spectral filter portions define and surround a viewable portion of the electro-optic element (100a; 100b) when being viewed from the first surface ; and an indicia being in the viewable portion and being disposed between the electro-optic medium and the second surface of the first substrate ; characterized in that the indicia is an identifier that indicates data related to the electro-optic element (100a; 100b) and is small or thin enough such that it is not perceptible or readily noticable by the human eye. <EOS>