Is this one of Lorenzen's?

[bob turner]

Maroon is correct. All of my FAs are stamped "Ken Kraft."

You know, with a careful re-shaping of the windshield openings, these are almost as good as All Nation! I prefer brass/bronze anyway.

[De Bruin]

....is the Ken Kraft stamped on the roof casting and or truck castings ..like the FA's ?

Yes Carey the F3 has what appears to be a single die stamping under the roof trough that accommodates the four centered-in-line
circular cooling fans. It appears as below

"KEN KRAFT"
"MEADVILLE"

Again per Maroon's post the truck side-frames on this example are Baldwins and are mounted on what appears to be crudely fabricated brass-stock bolsters, sans any markings.

Bob, I do think these A&S/Ken Kraft F's do compare well with the All Nations but ..."whew"... do require some skillful milling to eliminate the "Frankenstein look" there around the windshield and side windows.

[bob turner]

I use a carbide burr, and sneak up on it. Mistakes can be fixed, but better to go slowly. Same with the Alcos.

I do use an end mill on the casting half before soldering, but just to rough it in. Final contour is by hand.

[Carey Williams]

Thank you for verifying that the FA's are stamped / marked ... something to look for cheers carey

[ScaleCraft]

And according to Maroon, via phone call, the units shown in the evilbait offering in the beginning of this thread are NOT so marked, so they could be anything after Ken Kraft.
Including Loco Workshop.