Can someone kindly tell me the difference between a 19MM Lug Wrench that is stamped "19MM" on the handle versus one that is stamped "19MM" on the head or barrel of the lug wrench?

If you are the original owner of a 1970 911T, E or S that has it original tool bag, can you please tell me if your lug wrench is stamped "19MM" on the handle or on the head of the lug wrench. As you all know, none of the used OEM tools for early 911s is cheap and, if you are going to buy one, it should be the correct OEM tool for that year/model car. Please help me buy the correct 19MM lug wrench for my 1970 911T. Any information would be appreciated.