Curious question about RDG NMl/CR N4 cabooses. The NMls of 1941 were built in the Reading, PA shops. Does anyone know if these were Bethlehem, or similar, kit cars?

A little more info: Caboose #93920. Structural shapes are marked Bethlehem. Rosters say it was built by Reading but the question remains if it was built from scratch or was it actually a kit supplied by Bethlehem (yes, they made kits).

Car is likely going to be used as a static gift shop. It's in the process of getting a coat of exterior paint and the interior paneled.