Just waked up from sleep and found this lengthy discussion. Thanks OSRep for your genuine interest!
I offer to trade with OSRep for the IWC 79320 movement, so perhaps I can answer the queries here.
I had the same doubt on the newness of the 7753 when I received it from Joshua so I brought it to my watchsmith for checking. He told me that, after checking, it's "very" new, running perfectly and keeping accurate time. Of course it's unfortunate that he couldn't confirm whether it's 100% or 95% new... The date setter @10 is also working perfectly, the only thing you shouldn't do is, like other 7750, set the date when the time is between 7pm and 2am.
The more people here discussing about it, the more sentiment I've towards it and don't want to part with it..., even though I never wear it before. Very strange feeling... Regarding the trade, think I'd better leave it with PM.