My concern with "pre-order" watches would be...when do they charge you? up front or when the item is shipped?
You probably have very little risk if you use a credit card with strong consumer protection - may just take a while to have the charge reversed (depends on situation, I assume)
I pre-ordered the Ball Engineer II Genesis before Christmas. It still hasn't arrived. They took the money up front. I used a CC with full protection but I'm not sure about the rules here, since it's been well over 90 days from order to delivery. I'm not sure that CC protection would still be in full force due to the elapsed time. At least with Ball Watches, it's a well-known and respected company. I caught the pre-order right from their website so I'm not too concerned about non-delivery or refunds. With a relatively unknown company, I'm not sure I would take the risk.
PS - The pre-order mechanical watch in this thread costs more than the Ball Engineer II Genesis. FWIW, at this price point, I'd rather have a known brand name from an established company. Having said that, sometimes the desire for a particular style is worth the risk and expenditure. Whatever makes you happy.