Serial numbers, 3 s/n 001's same model?

#1
I am making a liner lock of the same model that is normally a frame lock, would it be normal to begin a new serial number range (s/n 001) for the liner lock even though it is technically the same model (blade and handle shape). How about the same model as a bolster lock? Begin new serial number range (s/n 001) for the bolster lock as well? What to other makers do?
 
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