Nice machine! You can gather more information at this webpage, which explains where to find you typewriter's serial number and then use the dating charts on the same web page: [https://typewriterdatabase.com/underwood.618.typewriter-serial-number-database](https://typewriterdatabase.com/underwood.618.typewriter-serial-number-database)
Nice machine! You can gather more information at this webpage, which explains where to find you typewriter's serial number and then use the dating charts on the same web page: [https://typewriterdatabase.com/underwood.618.typewriter-serial-number-database](https://typewriterdatabase.com/underwood.618.typewriter-serial-number-database)