Yeah did some research..
Dg2813 and dg 3804b are same, but gmt (2.00 gmt.) which 2813 doesn't have.
And the pic from trusty website is Infact a dg3804 as i did a spot the difference from ofreis site pics, also where the hand sizes are listed, I didn't check 2836 etc..
(Unless the '2813' listed on TT looks exactly the same as another Chinese movement, after all I'm no expert!)
I've already asked Joey a million questions lol
cheers panerai153