Yes, it is probably original. C Codes (1981) was the transition year from MBH's (Metal Bowl Handles) to wood handles on the bowls. I was also the year Weber changed from twin rivet wood handles on the lids to single screw wood handles. Anytime Weber made a design change to kettles they had a habit of using up available inventory of parts from the previous year. You'll find many variations of the handles on C Code kettles. Early production ones will have twin rivet handles on both the bowls and lids (referred to as a "triple double" by WKC members). Then you'll see ones like yours that have a combination of both twin rivets and single screw wood handles. The later production ones have all single screw wood handles on the bowl and lids.