Pair of Cool Old survivors. 2 Mortise slide locks skeleton style. Skeleton key pictured operates both. Probably need a touch of oil due to age. Left one is just a little tighter to turn then right. Though both turn (slide). When turning lock bar sits out about 1/8 approx on the unlocked side unless you push it with your thumb (in both directions) I assume this is appropriate or just the oiling. Otherwise a really neat and working old pair with a neat skeleton key that works. They do have some signs of age as would be expected.
Please review pictures please let me know of any questions.