<p>A seal comprises an annular portion (14) having a static seal surface (15) in contact with a first element (100) and made of an elastomeric material. An annular lip (11) exerts a dynamic seal in relation to a second element (101). A garter spring (12) and a leaf spring (13) cooperate to maintain the annular lip (11) in an operating configuration abutting on a sliding surface (101a) of the second element (101), whilst an annular locking element (16) holds in position the leaf spring (13).</p>
