Hi,
The '1925' is a French bicycle license tag for 1925 like this:
https://i.etsystatic.com/15558904/d/il/72e85e/1817864920/il_340x270.1817864920_j22q.jpg?version=0
These were renewed annually, so, if original, suggests a 1925 or earlier date.
I can't quite read the rest of the tag, but it looks like a name and address? If it's a French address, I would suggest 'Buffy' is actually 'Buffet', which is how it's pronounced in french.
Can't help more, except if there is a French name/address, let me know, and I'll see if that helps.
Best Regards,
Adrian