Over the years I have gotten about 4 or 5 lock nut wrenches. I have to say that none of them really fit that well and at least three of them are good quality Park Tools. More often I go for my Large Cresent Wrench for the Lock Nut.
Wrenches for the Cups can also be a bugger to fit. I found a Bottom Bracket Cup Wrench that perfectly fits old French bicycles in the parts bin of a motorcycle shop. I dont know who made it. I dont know what size it is. But it works.
I guess the best way to get the proper wrench for old Lock Nuts would be to take the Nut and try it on difference wrenches till you found the proper one.
Do note that taking Bottom Brackets completely apart on old bicycles can be a real art form. Take your time and enjoy the challenge...
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