Not 100% sure. Tender seems Lobaugh, but the locomotive could be scratchbuilt. Gearbox might not be Lobaugh. The screw holding the eccentric is strange. And the extra windows in that cab make me think that either very early Lobaugh or Pratt parts may have been used. Firebox is missing.
I'd call it most likely prewar Lobaugh with maybe postwar tender. 97%.