Front blade is an obvious modern replacement by Lyman/Williams/Ruger, etc. Probably needed the extra height to work with the peep sight.
Rear Peep is "modern Bubba" at best, AND with a hex head retaining screw at no extra charge.
The rear sight quarter rib is suspect and by extension so is the leaf rear sight, tho at least the leaf & base do look vintage (not likely original Jeffery)
- Mike