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_67583 ( "Model" text, "Specification" text, "Build date" text, "Total produced" real, "Wheel arrangement" text, "Prime mover" text, "Power output" text )

### Question ###
What is the build date of the locomotives with a total produced less than 45 and a fb-2 model?

### Accurate SQL ###

SELECT "Build date" FROM table_67583 WHERE "Total produced" < '45' AND "Model" = 'fb-2'