It definitely looks old. The hole on the top looks like it was drilled for a peg. There is a remnant of a copper nail. I started to get excited, thinking that it might have "monetary value", and did research. Some Dipstick On EBay had a similar piece, for which he was asking $10,000.
I took photos and sent a letter to the curator of The Constitution Museum. He answered that it was:
3. Very probably from a ship
4. Impossible to prove that it was from The Constitution, without Documentation, and
5. Of very little monetary value, even if it was.
I since learned that Constitution Wood, from the many refits, is not particularly rare. Guys used to have walking sticks made from it. The doors of the Customs House, here in new London, are made from it. Smaller scraps are sold in the Museum Gift Shop for $5.
In any case, I thought it would be a nifty piece to use. I made a turning blank:
Strange. This wood emitted an aroma when cut. I can only describe it as "oldness". I wonder if they treated it with something?
I like the way these came out!