Hello. I'm sorry, afraid I may not be able to provide too many specifics and the bike is in the shop so I don't have pictures.

It is a Santana frame from 1994. The brakes are center pull caliper cable-actuated brakes, I believe from around 1997 or 1998. The brakes do mount to a single point above the wheel. The brake shoes look like regular brake shoes for center-pull calliper brakes. I do not know the brand of brakes.

As this frame is not disc brake ready and this brake system is old I wanted to get a top notch brake system to replace it with. These are 700cc wheels and I plan on running 27mm Gatorskins.
The tech at the shop said he would recommend some Avid brakes that are popular with the cycle-cross riders. At $250'ish I just want to make sure I've tried to explore options, that's why I posted.
Thanks for the reply, I do appreciate it.