https://mrlock.com/cylinder-chicago-c4260-19-kd-for-t-handle-ou-4260/
Compx Chicago C4260-19 KD Cylinder for T-Handle OU-4260
Compx Chicago C4260-19 KD cylinder for the OU-4260 T-Handle. Cylinders can be supplied keyed random or keyed alike.
compx chicagokd
https://www.ultimatesecuritydevices.com/Chicago--Compx-H2011-Key-Also-known-as-2011-Key_p_1056.html
Chicago - Compx H2011 Key (Also known as 2011 Key)
Chicago - Compx H2011 Key (Also known as 2011 Key)-Chicago H2011 key - Double bitted key.Keys are professional cut and inspected by factory, not copy
also known aschicagocompxkey