Falcon 986 6pin-Schlage C Keyway 1-1/4" Mortise Cylinder for Napa Trim
How to Tell the Difference Between a Mortise Cylinder and a Rim Cylinder – LockNet
Ilco 15/16" Mortise Cylinder, 5-pin, Kwikset KW1 Keyway, Adams Rite Cam, Bronze Finish, Keyed Different - MBA USA, Inc.
2 Pack Brass Mortise Door Cylinder Lock, 1 1/4" Inch Length Keyed Standard SC1 Keyway, Door Replacement Lock Cylinder with 2 Keys Suitable for Home and Commercial Use (Golden). - Amazon.com