A reversible Thumb latch & Knob mortise lock that measures 3-5/8" x 5-1/2" high with the edge plate being 1-1/16" x 7-1/8 inches long. The Small Thumb latch measures 3-5/8" x 12 inches long. Sells for over $700 today and made by Acorn Mfg.

I also have those exterior handles at my antique mall shop for $45 if you have a double exterior door.

Please take a look at my other hardware items in my store, thank you.