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GM Titleblock Vertical Number

GM Titleblock Vertical Number

What is the intent of this number on a GM titleblock? I say it is the parent number of the drawing,
others seem to think it is the current number and rev level, only in vertical orientation.

RE: GM Titleblock Vertical Number

Probably something to do with microfilm or microfiche storage of old drawings.

RE: GM Titleblock Vertical Number

I doubt its anything to do with the rev level because right next to the number you have highlighted it says rev 2 in the box.

RE: GM Titleblock Vertical Number

Maybe the /001 means "page 1".

RE: GM Titleblock Vertical Number

It's a legacy thing from when hardcopies of large format drawings were stored rolled.

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