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_name_75 (clock_speed__mhz_ INTEGER, introduced VARCHAR)

### Question ###
What is the least clock speed (MHz) with January 1986 as introduced?

### Accurate SQL ###

SELECT MIN(clock_speed__mhz_) FROM table_name_75 WHERE introduced = "january 1986"