Yes indeed brass, my goof. It just doesn't look like they match, but I can always be wrong.
What I did find out though while trying to figure out the correct reading of the marks is that it says HITCHCOCK not just TCHCO... they must have had weak stamping on these, as there are a Lot that list these with jut at the middle of that name. So, I got sidetracked and never did figure out the Covell/Lovell question