Since they aren't many accounts of service in regards to lume replacement etc, I figured I would start a thread. I've had my Night Train for about a decade now, and finally made the decision to send it in for a full service and lume replacement. This is an original Night Train that has the tri color lume so it was a concern that Ball would have a dial / handset for it that would match. Ball USA indicated that their watchmaker would reach out to Switzerland to see what would be available. As it turns out, a dial and handset was located and is now inbound to Florida.
So, we will see how this shakes out! Since the lume was likely somewhere around the half life of tritium, it will be very interesting to see the new dial. I'll update the thread once I receive it back from service.