Jack, I don't have Min/Max marks or notches - unless that indentation on the coppery brass bit is a Max mark. I assumed that was just a crimp. If you look at the photo above with the welding rod there's nearly 3" from the sump bottom to the notch on my dipstick.
The Fiat adviser in MSCC posted me a photo of an electronic dipstick that had a plastic shroud around the bottom of the stick, marked Min and Max, but that's missing from mine.
Looks like I should source an Argenta Haynes Manual!
Thanks.