Is there a different between an Automatic Movement (21 Jewel) and a Dial-Same Structure as ETA Version-High Quality. It would $20 dollars more to get the Dial-Same structure As ETA version, so it the money well spend?
21J is a standard and well-respected movement, in most cases. The "same structure..." = Asian clone movement.
Chances are the clone movement is a high-beat vs. the low-beat 21J.
Ask the seller what movement it has and let us know. If it is the A7750 - run!
I think the seller is trying to explain he's selling you a 21j movement in a higher quality case and dial of the Swiss movement version. Generally the 21j versions have cheaper case, dial, AR, mineral glass, etc.