How do you find the age of a Montgomery ward Hawthorne bicycle?

To determine the age of a Montgomery Ward Hawthorne bicycle, check the serial number, typically located on the frame near the rear hub or bottom bracket. Montgomery Ward bicycles were often produced in specific years, so researching the serial number can help pinpoint the manufacturing date. Additionally, examining features like the design, components, and any unique markings can provide clues about the era it was produced. Consulting vintage bicycle resources or forums may also assist in identifying the age.