Kathy L.
Posted December 21, 2021 - 9:38am
Welcome to myBulova David, and thank you for sharing this wonderful heirloom from your grandfather, congrats! It looks to be a Military Issue watch like this one https://www.mybulova.com/watches/1944-military-issue-7898 if you look in the comments there is a chart for the serial numbers.
1944 Bulova Military Issue