[Stan the Man]

I have been successful so far in resisting chassis removal of my 38-8. I am wanting to get through the holidays before I dive into my first Philco.. So,.. I am getting to few things in hand before the time comes..
As I said, I am not wanting pull the chassis, so can someone tell me what gauge wire did Philco use? I have some of the cloth covered pvc stuff.. Its very nice wire but has a large profile, so I don't want to use it under the chassis.
I am wanting the true push-back variety, just don't know what gauge..

Thanks,.. Stan