Sargent 6-Line Series Entrance Lock with B Knob Design & O-Rose in Satin Chrome

The 6 line series are certified to ANSI/BHMA A156.2 Series 4000 Grade 2. Entrance/Office lock: Latch by either konb unless outside konb is locked by push/turn button in inside konb; Push button released by key outside or konb inside; Key retracts latch when outside konb is locked.

eBay