Originally Posted by
pastorbobnlnh
Are you certain it is a '71? It appears you have Prugnaut lugs and not Nervex lugs. Below is my my March '71 P13 for comparison. Can you post your serial number?
According to hints on "The Headbadge" and elsewhere, Prugnat lugs may have been used on some 71's. If so, that makes the OP's bike a pretty rare frame. My '71 P13 also has Nervex lugs.