[Jim McDougall]

The faceted pommel is indeed likely early 17th c. as is the guard, but the grip has been rewrapped and the banded wire clearly much more modern.
The blade is from a Saxony officers rapier of the 18th c. (Wagner, 1967, pp.243, 379, pl.29).
On these 'smallsword' form swords, the blade was 82.2 cm long, and the monogram corresponds to that typically used on Saxon blades 18th c.
with crown over the AR initials.
For King Augustus Frederick III ( Frederick Augustus II ,1696-1763) so the blade clearly of likely mid 18th c. period. Uncertain what period the refurbishing of these much older components might fall into, but the type of wide banding over the grip wire seems like the type found on various military hilts of latter 18th century, but usually over leather material.

Also of interest is the use of cross and orb on crown on this blade motif where usually other device is used in the examples I viewed.

Perhaps a 'Historismus' type composite and possibly intended for either fraternal groups, possibly even theatrical use. Whatever the case, the components appear 17th c. for guard and pommel, 18th century. Certainly a handsome looking rapier, and would be interesting to know more.