DG4813 what is up with this movement?

[luckie]

I didn't see it listed in the Movement section, I'm I just missing it? Can someone elaborate on this movement?
Thanks

 

[txrob779]

Hello mate,

I'll do my best here the DG4813
and the DG2813 are 21 jewel Chinese made automatics called 21j's.
They can both can be either 21,600 or 28,800 beat movements.

The 2813 is a 2836 sized movement and the 4813 is a 2824 size...
The 4813 is found in Omega's an other reps that require a thinner size movement.
The 2813 is in most Rolex reps...
My understanding is the 2813 is a direct swap or vice versa for the 2836.

These are referred to as a 21j NOT a a2836 clone, that is a totally different chinese made movement.

Hope this helps

 

[Bonesey]

Almost there Rob.

The 2813 is the 21,600 bph movement. The 4813 is simply a high beat version beating at 28,800 bph. There are exactly the same size.

The 2813/4813 is NOT a direct swap for a 2836.

 

[luckie]

So it's a 21j movement. OK that explains a lot. Thank you. Probably not something that would be good to work on my watch repair skills. I've got a manual wind that is so beautiful that I don't want to start with it. LOL
OH and again thanks for the info. Learning every day.

 

[txrob779]

Hey I was close....close enough for replica's LOL Thanks Rich

 

[R2D4]

I can confuse this further.

Both 2813's and 4813's have variations to include HighBeat. I was told this was designated with a -1 or a -2. Not positive though. Also note the factories can get other versions (same footprint) to include higher cannon pins and or datewheel overlays.

So the ones for sale at your Horological supply may or may not be compatible with your Rolex replica.

 

[Bonesey]

Hmm. Wasn't aware of that R2. From experience the DG2813s that I've had are never compatible. Canon pins are almost always too short. Might not be the rule, but I've never found an exception yet.

Sent from my HTC Desire S using Tapatalk

 

[KBH]

The DG 4813 movement's are very hard to find with the tall canon pin. Apparently they haven't been made for several years, although now they are starting to show up in some reps according to the TD's listings. I'm not so sure they are actually from Dixmont/Ghanzhou factory though.

None of the A21j are compatible with ETA since the hand sizes and dial mounting pins are different. Size wise they will normally fit an ETA case just fine.

Also the designation for the DG 21j with the day/date is DG 2803. The designation for the Day/date with the day on the outside wheel such as the Presidential is the DG 2812

 

[txrob779]

That is pretty much what I meant to say as far as crown height and postition being a fairly easy swap for a 2836. I just get a set of Mercedes hand for a Tudor Sub to fit the a2836 or the ETA2836-2. I have not come across a 28,8 21j yet. All of mine have been 21,6's. Thanks R2 and company for the chime in.

 

[frankt8242]

From what i've read ..>>>

The 4813 is a modification of the 2813 that changes the beat rate from 6 to 8 BPS...It apparently was developed to provide a low cost substitute to the ETA 28XX movements that beat at the 8 BPS rate...
Otherwise, the movements are virtually identical...
Now that ETA "clones" are being made in large quantities, the 4813 has become redundant...
Realistically, either movement can be mass produced at similar manufacturing costs...Why build both..??

 

[luckie]

Is there a diagram of this movement anywhere? Like where is the crown release?

 

[luckie]

How do you put a date wheel on one of these?

 

[GrimReaper]

This is based on Miyota 8215, same as DG2813 and Sea-Gull ST16/TY2806, right?
So the second hand stutter is still here?
How is it with reliability?
One of my 2813 is very problematic, midnight date shift quickly stopped working, and the watch has only 14-21 hours power reserve.
The other is fine for now.

I am asking because Planet Ocean V5 comes with this movement for just $148. And I first want to try how the watch feels on the wrist, if it is not too big.
But it would also be nice if the watch would provide me service for at least 2 years. Even if I buy Swiss ETA later, I can still use this as a beater.

 

[ThePadd]

I read this as I was looking for the definitive answer on the DG4813, which I eventually went elsewhere for.
The DG2813 is based on the Miyota 8215, and the 4813 is a high beat version of that. These are the same size-ish as the ETA 2824/36 movements but have different hand sizes and dial feet positions, so you cant swap them around easily. Seagull make creditable copies of the ETA movements and I have built several watches using the ST2130 which is a good accurate movement.
BUT beware the generic term Asian 21J as there are factories producing their version of the DG2813 and ST2130 movements and the quality can be very rough, and there are even nastier movements at the bottom of the rep price scale.
I have built watches using ST2130 (ETA2824 clone), the Seagull version of the DG2813 (ST16) and the GMT version of the DG2813 (DG3804B) and they are all good movements. My next move is to swap the nasty DG2813 copy in my missuses Datejust rep for a genuine DG2813 from Cousins UK, OR I may even go for a 4813 to really treat her (£30 vs £27)!

 

[Hinclimincli]

I read this as I was looking for the definitive answer on the DG4813, which I eventually went elsewhere for
The DG2813 is based on the Miyota 8215, and the 4813 is a high beat version of that. These are the same size-ish as the ETA 2824/38 movements but have different hand sizes and dial feet positions, so you cant swap them around easily. Seagull make creditable copies of the ETA movements and I have built several watches using the ST2130 which is a good accurate movement.
BUT beware the generic term Asian 21J as there are factories producing their version of the DG2813 and ST2130 movements and the quality can be very rough, and there are even nastier movements at the bottom of the rep price scale.
I have built watches using ST2130, the Seagull version of the DG2813 (ST16) and the GMT version of the DG2813 (DG3804B) and they are all good movements. My next move is to swap the nasty DG2813 copy in my missuses Datejust rep for a gen DG2813 from Cousins UK, OR I may even go for a 4813 to really treat her (£30 vs £27)!

Careful with that, make sure you speak with Cousins if you are going the 4813 route. Their DG4813 is actually low beat and it has a shorter pinion so you might run into trouble when swapping movements. I found out the hard way when trying to swap movements on a Regmariner.

 

[ThePadd]

Wow, thanks for that, I think I need to check this out more thoroughly. The movement heights of the 2 are different on the cousins website, presumably because the hand heights are different. More research required, thanks again for the heads up!

 

[ThePadd]

I did buy a DG4813 from Cousins, but rather than poke it in my other halfs gold datejust rep which she wears a lot, I made a Blue Submariner out of it, using 16610 style case, blue steel bezel, blue sterile dial and fat merc hands, both relumed green (ie not blue). Its a nice looking watch, but the movement is horrible, date change is gritty and winding is off and on. The worst part is, it keeps stopping for no readily apparent reason. I have a date wheel overlay to sort the date position, but I wont waste it on this movement, I've bought a gen Miyota 8215 from Cousins and will fit it on that!
The cannon pinion does look a bit low, and the movement is a bit slimmer than a DG2813 if you ask me, so I'd avoid it.