The main reason for disputing Mik's classification given above is what differentiates the Intercissa and Berkasovo typologies (the main typologies of Late Roman Ridge helmets); ridge helmets are either found with or without a base ring running below the bowl to which the cheek plates, nasal bar and neck guard are attached or without one entirely, with the cheek plates and neck guard attacked directly to the bowl. The former is a more complex type of helmet, using hinges and rivets (the Berkasovo-type) and the latter is a little more simplistic, attaching via leather strip and rivet (the Intercissa-type). Further information on the Intercisa can be found in the article for that helmet type (link below), however suffice to say for now that the Augsburg I fits more with the Intercissa typology than the Berkasovo one. Given the state of the Augsburg II find it is difficult to say either way, although it seems it does not feature a base ring.
Interestingly, however, a nasal bar fragment was found in the same context. The original reconstructors have attributed this to the Augsburg I whilst the client commissioning the Pustelak Brothers' reconstruction of the Augsburg II has requested it be attached to his model instead.
These helmets therefore seem to buck the trend of the typologies as we know them, perhaps indicating that such things are not nearly as cut-and-dry as we would like.
Sadly little else can be said for these stunning pieces. Without further context, we can make no reasonable guess as to the original owners beyond them being members of the Roman military. The decoration and style are, despite being highly intricate, sadly rather commonplace for the period and bear no distinctive markings that can help us further. As such, we would tentatively suggest they belonged to a soldier in either a limitanei or comitatus unit stationed either in Augsburg itself or assigned to the province of Raetia, likely in the middle of the 4th century. This is of course no guarantee, and the truth may be something entirely different…