Following up on AlphaZuluRomeo's post: If, as might be possible, this is indeed from the FA2100 series, then it could either be the a single recorder, or a model combining CVR and DFDR function in a single unit. To my inexpert eye, the product photos for either of these are a pretty good match (given low resolution and extensive damage) and are indistinguishable, the one from the other. While the brochure photo for the FDR variant is a much longer box, this may just be the difference between 1/2 short and long ATR packaging options. Within this line it does not seem one can distinguish the function readily by external appearance.
FA2100 CVR
FA2100 combined CVR and FDR
FA2100 FDR