There are some nice items pictured. The 312AC is likely a 1950 or 1951. The 9B transformer is probably a 1946, since the lights do not have the faceted covers it is likely not a pre war version. A lot of Gilbert track plus the four 36" pieces of K Line track. Hopefully he has the two control boxes for the turnouts. I wonder where the people and station are that go with the 735.