I have talked off and on about grenades that have withstood the test of time. Well I guess the F1 defensive grenade has to take the cake. Won't be just too long when the F1 celebrates it's 100th birthday of years of usage. The British Mills and U.S. MK2 had long runs of production, but the record has to go to the F1 and it is a great looking grenade no matter which country produced it or what fuse was used. Value of this post = nil...Dano