To go with the recording, the Beatles filmed a "promo"; an early kind of music video, in January 1967. The band had begun to grow mustaches, and Lennon began to wear eyeglasses in public, which he rarely did before. The changes made the Beatles look very different from how the public saw them earlier. The kind of glasses Lennon wore (sometimes called ""), were issued in England by the and the military, and he wore them making "How I Won the War". Lennon disliked the style as a boy, but now made it a by it.