Brothers from a different bladesmith - Two quite similar small swords

[werecow]

I also have only very limited knowledge of these but let me add my guesswork. I'm sure someone will correct me if I'm wrong.

The relatively wide globular pommel style and wide pas d'ânes on both of these look to me like a 17th century style, and that matches the blade cross section and relatively long blade length, and while I'm not sure, most of the smallswords I've seen without a knuckle guard are also 17th c... But the disk guard looks more like 18th century (specifically it reminds me of some cut steel ones, see attached: not mine, ca 1780 - though that may just be a superficial resemblance), and of course clearly the wire has been replaced and the pas d'âne rings don't quite reach the guard. Could that disc be an old replacement?