[drcy]

I add that in the old days, tintypes, daguerreotypes and ambrotypes often had their cases and frames switched. Someone way back when might have thought a family tintype would look nicer in a different case and frame, or the original case was damaged or worn, so switched it. Just like someone today reframing a photo or print. So that a case is from a different era than the photo doesn't prove a photo fake and is not a rare occurrence.

In fact, beginning collectors are taught not to date tintypes, dags and ambrotypes just by the case and frame, because switching was common.