Rummaging around with a magnet trying to find a bolt I dropped and fished up this instead. Was below the flywheel area resting on the chassis.
What is it? (Bonnet pin for scale).
No idea but maybe homemade, looks a bit uneven at the top,could be an anchor or tab for a spring but can't see a small hole for spring to hook thru.
Maybe it was a keychain attached to a spare key hidden on the crossmember?
Or a dog tag? I found one in my Series 1 (but it was alu, not magnetic).
Looks like a SU carb tag. Does it have any numbers embossed on it?
No numbers or marks on either side unfortunately.
Appreciate everyone's input, thanks all.