As mentioned above it has a Mark II caseback with a Mark III number creatively etched into the back. Actually according to alphahands there are no 944D serials for A386s.
https://alphahands.com/vintage-watch-research/zenith-a386-el-primero/
In terms of value I'd say it's worth $3200. The value is in the movement, crown, and case (excluding caseback).
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