MaxxGeek Antique Mortise Keyed Lock Set with Fluted Glass Knobs and Skeleton Keys, Fits 1-3/8"-1-3/4" Interior Doors, Backset 2-3/8", Oil Rubbed Bronze, 1 Pack - Amazon.com
ToPToToo Mortise Lock Set for Interior Door, Vintage Antique Gold Door Knobs with Lock and Skeleton Key, Old Door Knob Replacement Fits 1-3/8 in 1-3/4 in, Polished Brass Finish - Amazon.com
Medium Flush Mount Cabinet Door Lock & Skeleton Key
Prime-Line Steel, Satin Nickel, Interior Door Lock E 2330 - The Home Depot
How Does a Skeleton Key Work?
Solid Brass Door Mortise Lock Skeleton Key ~ 3/8" x 3/8" Bit
ToPToToo Mortise Lock Set for Interior Door, Vintage Antique Door Knobs with Lock and Skeleton Key, Old Door Knob Replacement Fits 1-3/8 in 1-3/4 in, Classic Oil Rubbed Bronze Finish - Amazon.com