If doing a Breda restoration you will find its impossible to find a BMR marked elevation knob. The reason being is the knob itself is not marked but the end of pinion is stamped internally

The PB elevation knobs are stamped both externally as well as externally
These are marked on the outside on the drum but also marked internally



The PB elevation knobs are stamped both externally as well as externally
These are marked on the outside on the drum but also marked internally


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