Had any American pocket watch manufacturers used blued steel screws ?

[A.F.W.]

Here is a Russells Limited I picked up on one of my travels overseas.
It is in a heavy 18K gold case.

[A.F.W.]

[Kent]

I think that they all did.

[A.F.W.]

the Elgin I posted a pic. of is the only American made watch in my collection that has blued steel screws.

[Kent]

Here's a Waltham, a Seth Thomas, and another Seth Thomas.

Here's another Elgin, a Peoria, and a third Seth Thomas.