Lots of different dial configurations on these.
Plain stick figures, printed Roman numerals, 3 diamonds like one noted above, and various combinations of diamonds and stick figures, I recently had one with 36 diamonds.
Not my cup of tea but they sell well.
Later ones had the cal 625 which was an evolution of the 620.
I think the main attraction to these is how thin they are (about 6.5-mm including the crystal) plus they are solid gold.
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