You caused me to get out my copy of MWO. I still believe the caseback is wrong for the movement.
From a close review of the MWO articles that cover the 145.022-69, the best that can be said is this was an early service replacement. It can as easily be said that the caseback is a relatively new addition, added by someone with imperfect knowledge attempting to increase the value of the watch.
The serial number is a million and a half below the earliest Straight writing -69, according to MWO and a million below the bezel change to DNN90. (I had painful occasion to learn this on another thread, regarding my -69 pre NASA serial number 28428149, which came to me with an incorrect DNN90 bezel, as another member here pointed out.)
Occam’s razor, I think the odds are strongly against the movement having left the factory with this caseback. My two cents.
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