The No. 77 Grenade was a British white phosphorus grenade introduced in sept 1943 & used during the Second World War. The No. 77 was introduced in 1943 and consisted of 8 ounces of white phosphorus, an impact fuse and a tin casing. It was intended for laying down smoke screens and as a signalling device. The grenade was also very effective as an anti-personnel and incendiary weapon. As well as being issued to the Home Guard, the Nº 77 smoke grenade was issued to the British army. This grenade was fitted with an 'all-ways' percussion fuse designed to set the grenade off when it hit the ground - the fuse was called 'all-ways' as it was designed to work no matter what way up the grenade was when it hit the ground.