Not crazy at all.
We need the movement serial number.
But by the looks of the pushers and mid case, it looks like this started its life as a 105.012-66 (HF case).
Somewhere along the line it got a service dial, crown, and hands.
And I guess there was no service caseback for a 105.012 so whoever serviced it, fit a 145.022 caseback on it instead...
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