Cooper key lock switch model 1204L.  Switch is in Cooper package but is actually Leviton product.  The Leviton part number is 1204-2L.  Also included is the Leviton key part # 55500-PRT.  This switch is brown and is spec grade.  120-277 volts. New in bag package.  These switches are 4-way but can be used as 3-way also.