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TABLE: CREATE TABLE table_63179 ( "Number" text, "Previous Number(s)" real, "Previous Class" text, "Converted" real, "Withdrawn" real, "Disposal" text )

### Question ###
Which Withdrawn has a Previous Class of j69, and a Previous Number(s) smaller than 68532, and a Converted larger than 1959?

### Accurate SQL ###

SELECT MAX("Withdrawn") FROM table_63179 WHERE "Previous Class" = 'j69' AND "Previous Number(s)" < '68532' AND "Converted" > '1959'