when you say 4***, do you mean your order number was "2017-4***"? if yes, that's all the orders since ming opened shop.
thus, if you got an 18.01 diver yours would have been mid-2*** and if you got an early 17.09 you'd have seen maybe 33**.
having said that, seems there are a thousand or so orders for 17.09s and yup, looks like a 12-plus-month wait