Pianotech

This is a 1928 Mason and Hamlin A action bracket. Any idea what the added fixture is? Every action bracket has this extension. 

Maybe to help hoist the full action around in the factory or a way to keep hammers from flopping around during transport . A long rod could go through the holes Maybe there is a patent on file since it is a genuine M & H bracket

This is a 1928 Mason and Hamlin A action bracket. Any idea what the added fixture is? Every action bracket has this extension. 

James - I like the 'transport' theory, except for 

- what it would have entailed as an added expense of that length of (presumably) disposable rod

• the added cost of otherwise unnecessary cast iron
• the significant awkwardness of removing the rod in a constrained setting

Any documentation as to whether this might have had a player mechanism?  Soft pedal lifting hammers closer to strings instead of una corda shift?

Alternately, pivots for a muting felt?

Maybe to help hoist the full action around in the factory or a way to keep hammers from flopping around during transport . A long rod could go through the holes Maybe there is a patent on file since it is a genuine M & H bracket

This is a 1928 Mason and Hamlin A action bracket. Any idea what the added fixture is? Every action bracket has this extension.