Originally Posted by
3alarmer
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...it's sort of interesting it has that lock ring on there. I don't know any way for sure to distinguish the Phil Wood BB without trying a tool in there. I think it has something to do with the number of splines. If it's not Shimano or Campagnolo, the only other thing I encounter here is the Phil Wood BB's .
I assume the lockring was put there because there were some exposed threads on the unit. The shimano tool does not fit and I don't have a campy tool. In any case, all the parts are from the early 70s and Wood is the most likely BB. I just hate to buy the tool without knowing whether this is a Wood BB but I think you're right. There's no way to tell until you try to use the tool.