I found a pill that is imprinted FD 553. It's made by JJ Banan Inc (a subsiderary of HD Smith). Unfortunately, I can't find a picture to verify if this is your pill or not. ( This is
Etodolac 300 mg)
Again, no way to verify that this is actually what you have. Maybe Robo, Zippy of one of the other senior's will be able help you better.
I might not always be right, but I'm never wrong.