I'm happy that its the genuine article, so would consider it suitable for my collection of issued military stuff.
We have to accept that issued watches will have had a hard life, been serviced many times, and redialled (possibly more than once) whilst in service, in this case, with the RAF. We also have to accept that there was some variation to dials and handset leaving the factory to fulfill the RAF's order during 1940s.
It is a particular feature of collecting issued watches that each one tells its own story, and this one's story is just as valid as one that retains its original dial; which makes it just as valuable in my eyes.