Here is some Maerklin tinplate currently on my layout. The 1881/1 hand-painted airplane transport car is from the 1926-1935 time frame. The airplane is original and complete except for the pilot figure. The 2591 Harbor Crane dates from 1930-1937.
There is a replica on eBay of the station you have in the background. Is yours original?
George, the station in the background is a modern reproduction.
Jim