The Kirkpatrick 3067 antique ironwork knob set is a standard ball knob available as a mortice knob set, for use on a mortice latch or lock, or a a rim set for us on any standard rim lock.  The antique black finish is classical country cottage.

Black Antique Finish

The 3670 wrought iron knob set requires little to no maintenance and can best be kept clean using warm soapy water and a soft cloth. In the event of chipping occurring the affected area can be cleaned, wiped dry and filled in with black enamel paint. For use externally more care needs to be taken to maintain the knobs in pristine condition and a light coating of wax or wiping with an oiled cloth regularly will protect them.