Ahhhhhhh, that's smart thinking ... I have an ETA 2846 in the Big Gonzo, specifically because I intend to USE that thing like a one eyed rented mule. I've got all these vintage pieces I never wear anymore because the autowind wheels are wearing out, so the 6538 is made to take their place. Let me know when you're more ready to do the 5508 project, I think I have the dial you need.
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Hoooooooooooooly smokes, dbane .... it doesn't get any nicer than that. Magnificent.
You know, you can send it to me for long term "safe" storage...