Got some additional pictures. They don't know the age, it was an auction purchase. I don't think they have any experience looking at hardware from the email I got. They just don't know, although they did feel that the hinges were replacements. Unfortunately their camera doesn't do well with close-ups, but have a look:
These screw slots look off-center to me, especially the one second up from the bottom, left side:
The handle looks nice n' old, the screw on the left side also looks off-center (hand slotted) unless I'm seeing things:
Not sure about these hinges. I would agree that they could be replacements, but I don't see any sign of old mounting holes: