automatico Posted September 28, 2019 Report Share Posted September 28, 2019 Seiko has an alphabet soup of movement designations and one movement that turns up in many homage watches and a few replicas is the Seiko 6R36. There is little doubt it is a few notches above an Asian '21 jewel' or etaclone movement. Here is some info on it: https://www.thewatchblog.co.uk/seiko-4r36-movement-review-which-watches-use-it/ I forgot to add the old Invicta standby, the Seiko NH35: https://www.thewatchblog.co.uk/seiko-nh35a-movement-guide/ Quote Link to comment Share on other sites More sharing options...
ceejay Posted September 29, 2019 Report Share Posted September 29, 2019 Can also be found listed as the Hattori NH35. I have a Seiko 5R-- on the bench at the moment for servicing. Unfortunately Mainspring/Barrels (they are designed to be replaced as a single unit) are not available any more, unless you want to pay a kings ransom. You can, if you're careful split the Seiko barrel and put in a generic mainspring. Probably the route I'll take. Or swap out the entire movement for a NH35. If you do this then you have to swap in the original date disk and stem/crown. The date on the NH35 is at the 3 o'clock position and the Seiko is at 4 o'clock. Another thing worth noting, the mainsprings on these run in the opposite direction to most movements. Quote Link to comment Share on other sites More sharing options...
automatico Posted September 30, 2019 Author Report Share Posted September 30, 2019 The only mechanical Seiko models I am familiar with are the Seiko 5 models from 10 or 15 years ago with the 7S26. I hardly ever work on one except to put a winding rotor 'in time' where someone got it out of whack or c/o the balance jewels to get one running so I can trade it off. A store I was with sold 'Fives' and we had so much trouble with them that we had to buy quite a few back so we stopped selling them. Low reserve and bad time keeping were the usual complaints. To be fair, I suspect many of the complaints came from former quartz watch owners. Sold a nos 'Five' to a guy a while back and he returned it not long after and asked: "What's the matter with this $#&%*@$ thing?" I gave his $$ back...all $35 of it. I still see posters on other forums singing their praises though. About 15 years back when we used to buy them for $35 or $40 each the guy we got them from claimed the Plain Jane dress models cost $12 out of the factory in Singapore. I did not believe it then but now... Quote Link to comment Share on other sites More sharing options...
madasboot Posted September 30, 2019 Report Share Posted September 30, 2019 On 9/28/2019 at 8:58 PM, automatico said: forgot to add the old Invicta standby, the Seiko NH35: https://www.thewatchblog.co.uk/seiko-nh35a-movement-guide/ R. Thank you for your constant enlightenment and knowledge sharing. Here is some additional info on the NH35A, a sturdy fifty buck mvmt on ali*xpr*ss best, M. Quote Link to comment Share on other sites More sharing options...
horologist Posted September 30, 2019 Report Share Posted September 30, 2019 I was just reaching out of infancy in the late 1960's where I recall that I had some nice toys which kept breaking down or did not work properly when they came out of the box and my late father said "what do you expect " made in Japan!!" I grew up with the fear to keep away from anything made in Japan if quality was at risk! Well we have made a complete turnaround that anything made in Japan is second to none for quite a long time now!! As I began to discover this ,I bought with total confidence and never looked back! I bought my first seiko from a garage sale for under $10 back in 1991 and used it as a beater for when doing work around the house and changing the oil in my car. Never serviced it and surprise surprise it still runs some 10 seconds fast per day. I recently opened of up to check the seals and even more surprising is that it is corrosion free and mechanism still looks pretty clean. It is a 17 jewel 6309 day date . Over the years I have seen many seikos which are a mixed bag of either very good or very #*%+#~. Then there is the Grand Seiko, high beat king seiko and the credor. I even remember the seiko Lassale where a watchmaker said back in 1982, "it is the best thing I have seen as a Japanese equivalent to a high end Longines" when Longines models sold for double the price of equivalent Omega models, but I was still not convinced at the time as I still had some Japanese broken toys in the back of the garage Quote Link to comment Share on other sites More sharing options...
alligoat Posted September 30, 2019 Report Share Posted September 30, 2019 I just bought a $105 Seiko- the SNZG13 with the 7S36C movement- 23 jewels. It came with a metal bracelet, but I put it on a modified Nato strap last week- I cut off the bottom part of the Nato strap and shortened it maybe 1/2"- used a quarter as a round form and cut it with a sharp utility knife and then brazed the nylon ends with a hot steak knife so that they won't run or unravel. This is an old steak knife that has been relegated to my workshop- I wouldn't recommend using your wife's fine knives! The movement is about 6-10 seconds fast per day. The lume is excellent- I can see it at 4 am. Haven't had a chance to check out the WR yet, but 100 m sounds impressive. Quote Link to comment Share on other sites More sharing options...
automatico Posted September 30, 2019 Author Report Share Posted September 30, 2019 Good looking watch! Here is a road test of an earlier model Seiko SNZG13 with a 7S26C: https://wornandwound.com/review/seiko-5-snzg-review/ Quote Link to comment Share on other sites More sharing options...
alligoat Posted October 1, 2019 Report Share Posted October 1, 2019 Enjoyed the article R, tanks! I don't know what the difference between the 7S26 and 7S36 is- I guess just one more refinement. I wasn't keen on the 42mm at first but it's growing on me. I'm also thinking about the SNK809 at 37mm- looks like it's running around $70- just wish it was a little more WR. I'm still trying to figure out what watch Scott Bakula/Pride was wearing on NCIS- New Orleans- the SNGZ13 was the closest I could come in a Seiko. Quote Link to comment Share on other sites More sharing options...
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