These saddle bags have no maker mark, but as a leather worker myself I really appreciate the craftsmanship here. They are hand tooled with white inlay, white buckstitching and sewn as well.
Period: I don't know exactly when they were made, but they are made well and in excellent condition.
How to put them on the saddle: There are two holes on each side where you can run your saddle strings through and tie. I added some strips of harness leather to give you the option of tying to the D rings as well.
Measurements: The bag portion of these measures 10" x 10", flap measures 5" with a 3" gusset.
For the reference, that's how they look on a small 14" saddle in the photo. They will surely look great on bigger saddle as well.