I got my only '70 a couple years ago. It was a rifle that had been modified and rebored, etc., etc. It is a pre-war, 1937, pre-64. Pre-war are before WWII. Anyway it looked great in the pictures and was good enough in person for me to buy at a cheap price ($1400), LOL. Anyway, I figured it out that it had been a 220 swift in a previous life, so I sent it out west to pre64win.com to make it right. I found a prestine barrel and sent it with. Basically, the only major thing on the gun that was worth anything substantial was the the cut checkered stock. I bought a four digit reciever and other small parts from them and they assembled a great looking and functioning (I wanted a shooter) pre-war 220 Swift. I was very happy with thier work and have around 3K into it all said and done. And that is what a 220 pre-64 '70 would sell for. I added a Weaver KT16. Pictured with my BSA, which is a whole other story.
Carl