With the pump pegs on the back of the seat tube, internal brake cable routing, internal routing for likely a Simplex rear derailleur, you likely have a Sport bike from the late 40s. Single ring up front, 3 speed in back and upright bars with the classy bone grips..

Having the binder bolt in front is somewhat rare post war, and it reminds me of something. If it comes to me I'll post.

If you are interested, for bars. Not affiliated with seller.

https://www.ebay.it/itm/Manubrio-Amb...16.m2518.l4276