Had a look at some video footage a railfan made of the Tweetsie copies built for a Cuban sugar plantation in the early 1920s. The best description I can make is that they had steel cabs, the cabs looked much like the "big window" steel cabs made for Bachmann's Big Hauler, except that there was a window post app 1/3 the way down the front. There was no wooden window framing visible.
FYI, I am sad to report that these locomotives were scrapped shortly after the video was made.
FYI, I am sad to report that these locomotives were scrapped shortly after the video was made.