This is a simple classic set of door knobs, rosettes and keyhole covers from the first half of the 20th century. In nice usable condition with a dark patina. Patina on the doorknobs is very even with only one small lighter spot and the rest of the brass has a mottled look. Shine as much or as little as you choose.
The only issues I note are two dents on one doorknob. The photo of the single knob shows the dent on the edge and the other dent is a slight depression in the middle that is hardly noticeable unless you tilt the knob just right. Facing the side dent down it would be hard to see at all. One keyhole cover is slightly bent in at the lower screw hole. You would likely not see it at all once installed.
If you need a lock to go with this set go to
Mortise Locks Door knob diameter 2-1/4
Rosettes: 2” diameter
Keyhole covers: 1-5/8” tall x 1-1/4” wide