I love the Cronos. The Cronos is a predecessor to the King Seiko, and thus a predecessor to the 44GS. Yours predates the hacking lever. It's a very nice movent based on a FHF that can run near Chronometer spec if it's been regularly serviced. Compare pics with the example shown here:
https://wristsushi.proboards.com/thread/16478/seiko-cronos-50m-divers
There's some moisture damage to the dial around the minute track, you have to decide whether you can live with that. You want to make sure the crystal and bezel are intact, as the bezel in this generation has a tendency to crack when removing it to replace a crystal.
Caseback looks good, not too much wear.
Relatively easy to service, but parts can be unobtanium, make sure nothing is missing, and it's in good running order before you pull the trigger.
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