You will find the Vanguard series at the bottom of that page. It appears that there are "subcategories" of the VS series. To narrow the date further down requires a knowledge of the model type within the VS series.
This is as close as I can get. You might inquire with Vanguard at this site.
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Authenticate History
You will find the Vanguard series at the bottom of that page. It appears that there are "subcategories" of the VS series. To narrow the date further down requires a knowledge of the model type within the VS series.
This is as close as I can get. You might inquire with Vanguard at this site.