Today's watch was one of a pile of watches I'd bought. It looked like a normal dial watch at first glance, but the numbers around the middle didn't line up correctly.
The reason for the numbers not lining up is that this watch by the Seiko brand Alba has an interesting feature - the middle of the face is a disc which is actually a 24-hr indicator. The central disc has the numbers from 2 to 24 (it only shows in twos) and rotates once in 24 hrs with the top being the time in the 24 hr clock. My one has a slight offset so the correct time on the dial actually appears at the 11 o'clock position, and I haven't worked out how to correct it.
The rest of the watch is pretty standard. It is a 3 hand dial with a Japanese quartz Y145 movement. I think it is from 1985 based on the serial number and style.
The full model number is Y145-6010, and it has an Alba strap with part number 6A71B.
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