Largest Tritium Serial Number Wins!

Let's see if the forum can find when Tritium ends. We all know that the official story is that 1997 is the end of the beautiful brown stuff but Omega (along with the rest of the Swiss industry) is not the most consistent. Watches in 1998 pop up with way higher numbers than the accepted range so let's see who has the highest of them.

My experience is in Speedmasters and seeing a number of watches in the 4838**** (1998's) with Tritium dial and hands. Interested to see what this wealth of knowledge has.