Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_80292 ( "NBR number" real, "Year" real, "Original operator" text, "Class" text, "Wheel arrangement" text, "Road number" real, "Location" text )

### Question ###
Which class starts after 1939 and has a road number smaller than 3508?

### Accurate SQL ###

SELECT "Class" FROM table_80292 WHERE "Year" > '1939' AND "Road number" < '3508'