Need help identifying which brakes on a 1959 Dodge Coronet – 3 platform type brakes or standard brakes???

I pulled a front and rear wheel and removed the drum on my 1959 Dodge Coronet. I was expecting it to be easy to identify but I'm just not positive. I think it's the 3 platform type brakes but wanted to confirm with the experts here. I'm also curious where the best place is to buy brake shoes. These are about the thinnest shoes I've ever seen. Thanks!!

Front drum brake and wheel cylinders.jpg

Rear drum brake and wheel cylinder.jpg