Roggin's Style Thumb Latch Theseus but the set screw may

but the set screw may be covered

The back of the plate appears to be marked 1011

This Lockwood Broken Leaf Double Key Door Plate  is an antique item and may show wear due to age

The doorknob is oval with incised striping that runs all the way around

Sargent Pat 1871 Decorative Window Lift

Roggin's Style Thumb Latch Theseus but the set screw mayRoggin's Style Thumb Latch Cast iron decorative Roggin's style thumb latch. This type of latch was widely sold in the late 1870's to early 1900's by many of the major companies. The set consists of a decorative handle with thumb latch, strap, latch bar, staple, privacy lock, jamb strike (not pictured) and 6 screws. The jamb strike might not be original but the latch bar fits into it and it is the correct shape. The thumb latch has a hole in the middle