Don’t think it will prove anything either way. but it would be interesting to see a view of the broken faces. Usually, the first bit to break will be rusty and the last bit clean and shiny. Did it start at the hole and work outwards or vice versa?

Doug
2011 Plus 4 in Rich Maroon

1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900