No one can tell you. Few months ago I would have told you around 10 days after ordering and 3-4 days after the item has been dispatched by Singapore Post but now I don't know anymore. It's been 40 days since mp4nation dispatched my Deltas ans 3 weeks since they were allegedly dispatched from Singapore to me and still nothing - and I'm not even including the 10-day delay of their release and the preorder time I've waited before that.
And to think for a while I was considering buying a dx50 to come with them - I would have been furious, so at least I have a lot of iems and just waiting for the Deltas is not annoying me too much. With that said, waiting this long is completely unacceptable and the only thing I can think of is that mp4nation again messed up something with the packaging and the labeling like they did with my R1.
I've been highly recommending mp4nation in the past but now I'm not so sure. Even if it's something that's not their fault that's causing this delay they are using this postal service and they should be able to get information and explain what's going on - like if there was a tornado or an earthquake in that region, or some new holiday that we are not aware of - any info on the matter would be welcome coz Singpost has always been super fast for me - I've even received stuff from LMUE in 4-5 days after ordering and have never waited more than 12 days, so to wait 40 days and to still not have the Deltas something weird should have happened and I have absolutely no explanation what is going on and the weird thing is that it's not just me but a lot of other people.
I am sorry it has still yet to arrive. Unless your in S. America, a few countries in S. Asia or a few places in E. Europe it should have arrived. There are only usually two reasons for this length of delay 1) its stuck in customs 2) without you knowing it your local post office has your parcel and waiting for you to collect it (the later normally happens when a postal employee doesn't go to your door to deliver and forgets to place a pick up card). Rarely do parcels get lost, in a year for all the parcels we send out we may only get 5-10 that end up lost, this is a very, very tiny fraction of the overall shipments we send out.
With our shipping, we use Singpost and normally around this time of the year the entire global postal system is usually at its max in terms of cargo, so parcels that take 10-20 days may take 15 - 25 to most western countries. Even if we shipped directly through HK Post it would be the same, this we do know as we do use HKP for some orders.
Also with airmail, unlike say Fedex, there is a chance it can take sometime to arrive, your experience so far with parcels coming from outside of your country has been good, but i can tell you if you as you become a more seasoned importer of wares through registered airmail every now and then a parcel will take sometime to arrive, be it from us or anyone else.
What i would suggest is PMíng me your order number so i can look it up, i do have a lot of experience knowing where to check tracking even when it may seem your own country postal website doesn't show results for inward registered airmail.
Again quite sorry your Deltas are still a no show.