I was wondering when my foodsaver vac 550 was made? It has a part # 35-1400 and a tag on it with the number; 00-48-A-04-4411. It's been a workhorse and problem free for a long time. I would just like to know how old it is. All I will need to replace is the rubber seal some day as that is the only thing that shows wear so far and I have USED it quite a bit.