There are numerous charts on the web for doing this lookup.Note: Using the text, table, or images on this site in an ebay auction without permission is a violation of your ebay Terms of Service.
Later on, I found the original case for it at an auction.
Though a television’s product number relates to the product and is shared by all the TVs in that same product line, each TV gets its own serial number.
The manufacturer maintains a database of all the serial numbers of its televisions.
I found the serial number listing on the site quite easily and found the date of manufacture for 2 of Graphics.
It is useful to have a resource for buying/selling Gralflex parts etc a sadly lacking feature of