Hmmmm, I took in all sorts when at school, stuff I knew then was safe, but do remember a head teacher rambling on about stuff found on Moors and Hills etc (I was in Cumbria at the Last years of Secondary) in assembly and how we should report it and not bring it home or bring it to school.... It turned out one lad had found a 2" Mortar ( Smoke) not live but it it did cause a panic when some bird grassed him up.... I did tell him when we unearthed it with my metal detector don't take it to school......
I was taking all kinds in at the time, bayonets, inert grenades, replica 1911 ... the list is endless, today I wouldn't even get near the school gate...... probably wouldn't make it on the bus, maybe at the time thats why I never got any where with Christine T**** ....