Here is a set with one spring, I think.

All the ones that I have used on 216/235/261 engines have a thin contact-spring and a thicker spring (two pieces) that went around it. It looks like one-piece contact/spring points-units are now available.

Here's one with two "springs".

Here is one for a 1959 235 at Rockauto.com.

Can you post a photo of what you have?

What is your NAPA part number?