If you can get a rub off the tag, StarCraft Serial numbers first two digits are the year of manufacture. I am lucky enough that my Seafarer has a fairly intact data plate. I did copy all that info into a new USCG data tag that is on the boat. When the original tag came off (don't ask), I decided to keep it with the registration and stuff onboard. Keeps the history traveling with the boat. If a rub off doesn't work, try a softer lead pencil across the tag itself. Wipe off the graphite and you may get enough coverage to see the data. Also, if you can get the tag off without damage, do a rubbing on the reverse. The punched in data often shows well that way, just in reverse. At least you can determine things that way.