If you want something new and as close as possible to the "Moon Watch" then you want the 3570.50. Hesalite crystal with solid back, cal.1861.
For me, now, I have the 3573.50. I like the durability of the sapphire crystal and the exhibition back is a bonus. I have been through several Speedies and have settled on this.
You can't go wrong with any Speedy, really.
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Russ
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