No ID Golf Ball

I found a Titleist golf ball that is not labeled as far as what type it is. It looks like a Pro V1x or an NXT Tour, it has a red number. How do I know what type this is and where does someone get a non- ID ball?

Eric

possibly a refinished ball or maybe test ball?

Could be a mis print from the factory

    I tested some new Titleist Red #1  that had TEST on the side   nothing else

You can do the bounce test    take  a PRO-V  drop it on a hard surface    listen to the sound  and watch the bounce

do the same with the ball you found      my guess   a NXT-Tour         try it  and see