AS fakemaster says.
There is no 1:1.
There are watches that are great starting points (bk's wm9 may be the exception) but they still need mods.
For the most part the otb that you buy claiming to be 1:1 will be good enough,but onc et=you know the differnece you want it as close to gen as possible.
I bought a euromariner and said it would be fine the way i bought it.
Nope,BK has it right now and it's getting fully modded.
I also find myself scanning the for sale section looking for a vintage sub or another fully modded wm9.
LOl...