For more than 40 years I have been wearing Seiko watches. My current solar watch has been running issue-free for about two decades.
I chose the SUT167 because of its larger face and easy to read numerals, even without glasses, the primary purpose for the purchase.
Quite disappointingly, I have to report that this watch does not meet the SEIKO standards I am used to. It started up quickly after having been subjected to natural light, the time and day function was easy to set..all good so far.
Noticed quickly that the illumination did not function and the watch did not keep time. Initially it ran somewhat slow, which I attributed to lack of battery power. A few days later it ran five minutes fast within a few hours after setting it again. Over night it slowed down again.
I gave it some time to be subjected to daylight in the hope that that would slowly solve the issue. It did not.
Thanks to Amazon's return policy I'll be returning this time piece.