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_34808 ( "Year of Issue" real, "Description" text, "Weight" text, "Diameter" text, "Thickness" text, "Edge" text )

### Question ###
Which Thickness has a Year of Issue smaller than 1983?

### Accurate SQL ###

SELECT "Thickness" FROM table_34808 WHERE "Year of Issue" < '1983'