The "freckles" may be the wood drying, as I have some Pear wood that done the same to me. It will take a long time before it all becomes brown as the spots but it time, it will get there...!
However, and being only too familiar with temperamental woods, woods with a mind of its own and totally unpredictable woods, with everything in between, I should also say that, I may be wrong and the wood species has those natural brown spots as part of its characteristics so, I'm afraid, you may have to wait a few long months before you will know if I was right or wrong...!
Good luck,
PS: Great shape and finish, tough...!
Cheers
George