joegut 0 Posted April 6, 2017 Greg,or any one of the more experienced guys on the forum. Have you heard of AUTOMATIC MJ 938 movement? I did my search but no info found. Can anyone can coment? Regards Share this post Link to post Share on other sites
greg_r 81 Posted April 7, 2017 Thanks Greg, nice work!! Has you seen any improvement on the movement quality over time or it's still valid since you made your assestment? The post is regularly updated. If you'll read to the bottom, you'll see that it was last updated in March of this year. Share this post Link to post Share on other sites
JRA 0 Posted May 7, 2017 Hi A few years ago my brother received a Rolex submariner replica. He’s been using it and he says it’s very accurate and he want’s to know what type of movement has. I’m using the watch a couple week and my impressions are: . Bezel accurate with 120 clicks . Seems to be made of quality material – ceramic? . Cyclops with 2,5 times magnifier. Or something closer to that . good material case . the crystal is scratch proof. All the tests made I can say it’s Safire . The date changes exactly at midnight . waterproof – I don’t know how deep it can go but submerged in water for 12 hours no problem . it loses about 2 sec per day . All marks and stamps are like the original. So I opened it to check the movement but it has no marks or brand manufacturer. Can Someone help looking at the pictures I send? Thanks https://www.dropbox.com/s/lgwqs0m5iu2daqc/IMG_20170505_163233.pdf?dl=0 Share this post Link to post Share on other sites
GenTLe 1,501 Posted May 7, 2017 https://www.dropbox.com/s/lgwqs0m5iu2daqc/IMG_20170505_163233.pdf?dl=0 It is a cheap 21j, basic movement. Share this post Link to post Share on other sites
black263 228 Posted May 7, 2017 The thing about a 21J movement is that it can be like a lottery ticket. There are thousands and thousands produced and a massive spread in accuracy. Let's say the accuracy ranges from +1 min per day to -1min per day. With the thousands produced, statistically some will be absolutely accurate. Win the lottery and you get one of these. Looks like you got reasonably close. Share this post Link to post Share on other sites
JRA 0 Posted May 7, 2017 Thanks for your help guys. It's very usefull. All the best Share this post Link to post Share on other sites
NearlyPerfect 0 Posted May 20, 2017 Asian 2892A2 21J Automatic Movement What can be told about this ? The genuine 2892 is a workhorse. Is the copy this good ? Share this post Link to post Share on other sites
GenTLe 1,501 Posted May 20, 2017 Asian 2892A2 21J Automatic Movement What can be told about this ? The genuine 2892 is a workhorse. Is the copy this good ? Did a couple of services on it (my LW The One and a spare movement bought M2M). It is in pair of the good a2836/a2824. Only SeaGull does it and that's a guarantee (SeaGull in my view are the best Chinese movements around). Share this post Link to post Share on other sites
ntivos 4 Posted July 7, 2017 Thank you all for so deep answers to my question regarding movements. Cheers! Share this post Link to post Share on other sites
The astromaster 0 Posted July 7, 2017 Great post! Just wondering, would be the best movement that will not need a service for a long time? I'm thinking that the Miyota 9015 would be the best. Share this post Link to post Share on other sites
coherent 0 Posted August 21, 2017 may i ask what is the function of the 'jewels' in 21J/27J movements? Share this post Link to post Share on other sites
maxmood 0 Posted August 21, 2017 13 minutes ago, coherent said: may i ask what is the function of the 'jewels' in 21J/27J movements? http://lmgtfy.com/?q=jewels+in+movements Greg, thanks for putting this info together. very helpful and informative. Share this post Link to post Share on other sites
black263 228 Posted August 21, 2017 4 hours ago, coherent said: may i ask what is the function of the 'jewels' in 21J/27J movements? Always keep jewels and movements separate. Once you get movement on your jewels, you need a long shower and deodorant to get back to normal. Share this post Link to post Share on other sites
WatcherM 0 Posted October 23, 2017 Thanks for the great guide! I was wondering if anyone knew how the SA 3131 Movement used by Perfect Clones is compared to the Asian one (eg: http://www.pf-818.com/0-rlm00202-milgauss-116400gv-ss-ss-blue-sa-3131.html)? Can you see a visual difference, and is is worth $130 extra dollars? Share this post Link to post Share on other sites
cbrian26wvu 0 Posted November 1, 2017 Thanks for the info! Share this post Link to post Share on other sites
knowlesy 0 Posted November 13, 2017 Great thread! Answered plenty of questions thanks Share this post Link to post Share on other sites
pmaxcslt 0 Posted November 30, 2017 Another great informative guide. Are the SA3135 movements still considered unreliable. Some post have indicated that they may have fixed the problem. Share this post Link to post Share on other sites
greg_r 81 Posted November 30, 2017 23 minutes ago, pmaxcslt said: Another great informative guide. Are the SA3135 movements still considered unreliable. Some post have indicated that they may have fixed the problem. They're better than they were, but still less reliable than the regular clone ETAs and can be a problem to service. Share this post Link to post Share on other sites
BadPickle 2,741 Posted November 30, 2017 It’s the parts that are difficult/impossible to get for the 3135 Share this post Link to post Share on other sites
BadPickle 2,741 Posted November 30, 2017 It’s the parts that are difficult/impossible to get for the 3135 Share this post Link to post Share on other sites
splke 4,383 Posted November 30, 2017 apparently It’s the parts that are difficult/impossible to get for the 3135 ? Share this post Link to post Share on other sites
black263 228 Posted November 30, 2017 Could it be that the parts are difficult/impossible to get for the 3135. Share this post Link to post Share on other sites
Glaude 1,615 Posted November 30, 2017 I've read somewhere, don't remember where but anyway that in fact, it appears that the thing is that..... the parts are difficult/impossible to get for the 3135 Share this post Link to post Share on other sites
black263 228 Posted December 1, 2017 15 hours ago, Glaude said: I've read somewhere, don't remember where but anyway that in fact, it appears that the thing is that..... the parts are difficult/impossible to get for the 3135 It seems obvious to me that, if you're going to make, say, 1000 illegal movements, you'll buy 1000 mainsprings, 1000 of each cog, and so on. You then use it all up making movements. You don't order in a stock of spare parts to hold for your non-existent after-sales. Share this post Link to post Share on other sites
Zeerash 0 Posted December 22, 2017 (edited) Hello guys, I hope this is the right discussion area because I desperately need some help on my new purchase. I recently bought a Submariner vintage 1680 with A2836 movement. For the last of couple of days, on few occasions I have been noticing that while I change the date makes the hour hand shake, does not happen every time though and also the crown slips once in a while when setting the time or winding the watch if it requires. I sent email to the TD and he is more than happy to help me by sending it to the factory to be checked since I am from Canada and wondering if these really are the defects that need to be fixed and I should take the hassle of shipping it back to them or perhaps it's totally normal and is a known issue with this watch or the movement. Your kind advice would be highly appreciated. Thanks. Edited December 22, 2017 by Zeerash Share this post Link to post Share on other sites