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_28 ( diameter VARCHAR, year_of_issue VARCHAR )

### Question ###
Which Diameter has a Year of Issue of 1977?

### Accurate SQL ###

SELECT diameter FROM table_name_28 WHERE year_of_issue = 1977