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bobble
hamrack
Looks like a 1". Measure the diameter of the quill, if it's 22 mm then it's a 1". If it's 25.4 mm then it's a 1 1/8".
As for the BB, I'd venture a guess that the LHS of that spindle looks corroded. Give us some better pics of the races (cups and cones) and we can let you know more.