This piano is way pre 1930s, all productions mostly of Square Grand Pianos ended at around 1900. By which many people were using upright pianos more in their homes.
This piano probably has a name somewhere in it if it has a number. Those numbers are the number of how many the company produced up to when your piano was made. I would guess this piano from the mother of pearl look is probably 1850s pre Civil War or around that time era. Go to

They may be able to help you futhter!:)
PSO Piano Shaped Object!