You can try researching the historical records of German U-Boats and their operations during World War 2 to see if any of the numbers you've found match those associated with specific submarines. Online resources, historical archives, and specialized databases may offer information about the history, missions, and fates of individual U-Boats.
To narrow down your search, focus on the time period and area of operation where the binoculars were found, if that information is available. Comparing the numbers you've found with historical records and technical specifications of U-Boats may help you identify a potential match.
However, it's important to note that the binoculars may not always have a direct connection to a specific U-Boat. They could have been used by other units or personnel, or they may have been swapped, lost, or salvaged independently of their original vessel.
If you find a close match between the numbers you've found and historical records, consider reaching out to historians, museums, or experts specializing in naval history or World War 2 artifacts to confirm your findings. They may be able to provide additional insights or conduct further research to help you determine the potential link to a specific U-Boat.