Anyone know the model of this Seiko 5?

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I’m guessing 80s or so tonneau case but the day date window assuming that’s what it is seams to be pretty far inboard indicating a small movement. I don’t really know these at all im just trying to help a family member who’s had someone pass away.

 
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Day / Date discs on Seiko movements can be smaller in diameter than the main dial. Possibly a caliber 7S26.
All of the information will be on the caseback.
If you can get better pics of the dial and outside of the caseback it would help.
 
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Caliber case designation are on the back of all Seikos.

can you show a case back shot?