Nitro or poly finish on early basses?

[jogi]

Can anyone tell me whether the finish on early high polish basses was nitro or poly?

 

[noodles]

I'm not 100% but I think it has always been poly.
Nitro isn't used by many builders anymore because it cracks.

 

[Grgzilla]

+1 for poly.
But dont quote me on that.