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_49662 ( "Year" real, "Class" text, "Team" text, "Points" real, "Wins" real )

### Question ###
Name the Wins which has a Class of 350cc, and a Year smaller than 1973?

### Accurate SQL ###

SELECT SUM("Wins") FROM table_49662 WHERE "Class" = '350cc' AND "Year" < '1973'