Thank you for viewing my item!    Available is a Dia Compe Rear Brake.    It is marked with the numbers 5583 and 610.  It is also marked Japan.   The item was pulled out of a tote of bicycle parts bought from a bike repairmen's estate otherwise we do not know much about the item.   Shipping will be $5 in the US.    Outside the US will be $24(US) for first class mail.