The hinged door at bottom left is the original 1948 ice box in my galley. It accepts a 20 lb block of ice in the upper compartment and a case of beer in the bottom. The ice shelf has a drain tube that runs through the lower compartment and out the bottom of the trailer.
I believe the original galley probably had a removable water tank on the other side of the stove shelf, it seems that many tears of this vintage had them.
Are you trying to replicate an old ice box, or just get inspiration for an old-timey galley layout. If the former, I can take some pix of the interior of the icebox. I use it only for beverages, it's not insulated well enough to be safe for food anymore.