ML lockable turn knob with thumb grip.
Can use either the 16.5mm or 18mm cylinder
Knobs can be used in the majority of Lehmann range.
The knob can be realeased from the lock housing by depressing a small lever at the bottom of the knob with the aid of a small pin or by using a wire release key ULO015801361 here .The cylinder has to be removed prior to this.
Manufactured by Martin Lehmann