How old is a Kingsbury upright piano no 58820?

To determine the age of a Kingsbury upright piano with the serial number 58820, you would typically refer to the manufacturer's production records, as Kingsbury pianos were produced mainly in the early to mid-20th century. Serial numbers can help pinpoint the year of manufacture, but without specific production records, an exact year may be challenging to ascertain. Generally, pianos with similar serial numbers suggest it could be from the 1920s or 1930s. For a precise date, consulting a piano expert or appraiser with access to Kingsbury's historical data would be advisable.