I agree Tim, not oak but most likely maple, grain is too closed to be oak. Birch? would like to see a sanded down portion to make that call.
Just looked again at photos I will have to go with maple. BTW that is some nice looking pieces of wood regardless of species.
Wisdom: Where experience and knowledge combine and become one.
"We are all one decision away from Stupid!!"
"How often we sacrifice the permanent plans of God on the altar of immediate solutions"
I have a very good memory, just short is all.