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_68 (points VARCHAR, entrant VARCHAR, year VARCHAR, engine VARCHAR)

### Question ###
How many points were there in a year earlier than 1977, a Cosworth V8 engine, and an entry from HB Bewaking alarm systems?

### Accurate SQL ###

SELECT points FROM table_name_68 WHERE year < 1977 AND engine = "cosworth v8" AND entrant = "hb bewaking alarm systems"