British Pattern 1907 Bayonet (Bayonet No. 1 Mk I) Sword bayonet for use with the .303 caliber Short, Magazine, Lee-Enfield No. I Mk. III (SMLE) rifle. The Pattern 1907 bayonet is widely recognized as the bayonet used with the SMLE in both the First World War and World War II. Millions of P1907 bayonets were produced in Britain, Australia, India, and the USA. The scabbard pictured is a No. I Mk. II scabbard with the teardrop frog stud. Some scabbard producers adopted a round frog stud, which was approved in 1915.