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 (175, 178) between the second and the third surfaces, wherein the primary seal (175, 178) 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 (124, 136) 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 (124, 136, 196) contain opaque or mirror-like constituents with low optical transmissivity and the spectral filter portions (124, 136, 196) 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 (175, 178) between the second and the third surfaces, wherein the primary seal (175, 178) 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 (124, 136) 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 (124, 136, 196) contain opaque or mirror-like constituents with low optical transmissivity and the spectral filter portions (124, 136, 196) 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.