The object is clearly some sort of amulet engraved with a scripture. Not a scriptural record as such.
Um, it obviously is a scriptural record, otherwise why was it recorded? The mere fact of its existence shows it is a record.
Adams shows the significance of this archaeological discovery:
More on the Silver Plates from Lehi's Jerusalem
William J. Adams, Jr.
In the Spring 1994 issue of the Journal of Book of Mormon Studies, I described the discovery, unwrapping, and translation of silver plates found in a Jerusalem burial site that dates just before the Babylonian captivity.1 This time frame is that of Lehi and his family. The importance of this find for Book of Mormon studies is that sacred texts were written on precious metal plates, and thus Lehi's search for the plates of Laban and his writing on precious metal plates are real possibilities.
A recent issue of Biblical Archaeology Review gives additional importance to these plates in the article "10 Great Finds," by Michael D. Coogan.2 Dr. Coogan was asked to sift through all the archaeological finds in Palestine and determine the ten most significant for biblical archaeology. In doing so he tried to list finds that are representative of whole areas of endeavors. For example, one of his choices was the Gibeon water system. Not only is it a marvel by itself, but it also represents other engineering feats of the Israelites.
Coogan selected these plates as one of his ten great finds because, in the overall picture of biblical archaeology, they "are the earliest inscriptions containing a text also found in the Bible."3 These texts represent the work of scribes, such as those of the Dead Sea Scrolls, who preserved the Bible for us. He concludes that the significance of the texts "is inversely proportionate to their size, for they are our earliest witnesses to the text of the Bible."
Notes
1. William J. Adams, "Lehi's Jerusalem and Writing on Metal Plates," Journal of Book of Mormon Studies 3/1 (1994): 204–6.
2. Michael D. Coogan, "10 Great Finds," Biblical Archaeology Review 21/3 (May–June 1995): 36–47.
3. Ibid., 45.