This
is a scroll that contains the Thehilliym (Tehillin
/ Psalms), found at the caves in
The Paleo-Hebrew writing of YHWH in both of these scrolls is of a varied writing style, both in territory and time, compared to known archaeological inscriptions. Please see the Ancient Alefbeth chart. The "yod" is closer the known style of the Moabite 9th century BCE; the "he" is similar to the known Phoenician of 1000 BCE; and the "waw" is closer to that of the Lachish style, dating around the 6th century BCE. Scribal schools in differing territories, adopted their own styles of writing.
For further biblical and historical information on the name YHWH, please see the studies:
Kathryn QannaYahu