The number to be most concerned about is how many "bars" are marked on the body. They should all have the same pressure in bars stamped on them (and hopefully set at that pressure). After that as long as they fit it dose not matter.
If you pulled the injectors off of my car and looked at the numbers on the body you would be shocked. I built up a set of injectors for my 84 300d using VW rabbit injector bodys. I set the injector pressure to the proper pressure for my vehicle but the bodys are stamped with the bar reading for the VW rabbit.
I noticed that the Bosch rebuilt injectors have a plactic band with the rebuilt injector # on it. This plastic band covers up all the stamped letters and numbers on the injector body. I believe that they do this so the can grab any injector body regardless of the bar reading stamped on it and build it into what ever injector they want it to be leaving only the # on the plactic band for the customer to see.