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7002 Myth debunked

11K views 34 replies 20 participants last post by  nzwatchdoctor  
#1 ·
While at the Midlands fair, a chap who is an ex Seiko collector, now turned dealer was picking his way through Jim W’s offerings of very nice condition, and reasonably priced Seiko’s. for a second time around.
We pointed out the 3 or 4 clean and original 7002’s that were in the case.
His reaction really surprised me.
He recoiled back as if he’d just spotted a tarantula crawling around inside the case, he gritted is teeth and sucked in, like a mechanic does when he’s about to tell you that the little rattle you can hear in your car is about to cost an arm and a leg to repair.
“7002’s, are hard to sell, because they’re full of plastic parts”, he said.

Ive heard this said on quite a few occasions and seen it on several forums, Seiko filled the 7002 with plastic parts to cut costs.

So its time to debunk this myth, Ive made a comparison of the 7002 with its predecessor the 6309 729x and its successor the SKX 007/ 7S26-002X.

Usual drill, click on the pic to enlarge

The 6309 has no plastic parts in the case construction, I.E the crystal gasket is rubber/neoprene, Im not sure exactly what its made from, but its not plastic.
The movement has a plastic dial spacer seen here.

Day & date wheels and guard removed you can see the intermediate date driving wheel is plastic, and the day and date wheel fingers are also plastic.

Not finished quite yet, remove the rotor and auto wind frame and theres a plastic shield under the lever pawls, IIRC this shield was metal on other 61xx calibers

.
On the 6309 total of plastic parts used is 5.


7S26/SKX

I don’t have a case to show, but the case construction uses a plastic crystal gasket.
The movement has a one-piece plastic dial spacer and movement spacer. Day and date wheels are also plastic. They are Aluminium on the 6309 and 7002.

Day, date wheels and guards removed and you can see that the quickset wheel is plastic, the intermediate date driving wheel is plastic and also the day date fingers are plastic.


On the 7s26 total of plastic parts is 7 (inc., crystal gasket not shown)


7002.
Again I didn’t take a pic of a 7002 case, but the construction is the same as the SKX and uses a plastic crystal gasket.

Movement, the dial spacer ring and movement ring are plastic, in 2 parts unlike the one piece found in the SKX. Under the date wheel guard is a plastic intermediate date drive wheel.


Total of plastic parts in a 7002 is 4 (inc, crystal gasket not shown)


Conclusion.
So the 7002 has less plastic part than the 6309 and the SKX. The SKX is the clear looser, Now if you take the actual moving plastic parts, again the 7002 comes out on top as it only has 1.

The "7002 is crap because it is full of plastic parts" myth successfully debunked
 
#8 ·
This is a great post!

Sadly, once a myth has been started, it can never be truly busted. Many people will never see this or will simply ignore it in favour of their misbegotten bias.

I really would like to see these watches 'catch on' so I can realize some profit from them :cool:
 
#9 ·
I’d like the spread the rumour that they are made from spider silk and spun mist so that they get really cheap for a while. Just long enough so that I can collect three dozen...


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#14 ·
I'll take them over the lamented 7S26 family anytime (what was it, a, b, c, are they up to x now? Why didn't they just junk it instead of making successive iterations that simply didn't work) but for sheer "the slightest movement of your wrist will set it running" joy (and that's subjective), the 6309 has it beat

Ivor,

Nice job, myth-busting!!
 
#12 ·
Certain plastics and rubbers can decompose rapidly. It all depends on the chemical recipe (formula) and stabilizers. Plastic supports for some of my shelving eventually disintegrated letting them collapse. My window blinds plastic fittings turned to dust as well. However, I see no reason that a well composed plastic could not last for centuries.
Question is; how good is the plastic that Seiko uses? Is it brittle, soft, temperature and oil resistant? Some plastic breaks down rapidly in UV light, others are UV resistant. Good plastic, unlike metal is unlikely to wear and certainly won't rust or magnetize, so it has its place.
 
#15 ·
Judging from the number of date wheel mechanism failures in the 56 family (and in certain other calibers) I would say good, but not very good.
 
#17 ·
I have a 7002-7020 since 1994-95 when I bought it in Seiko HongKong and still running good. Only serviced once in 2016 Seiko Service Center. I used it a few times scuba diving and many times just swimming at the beach or at the swimming pool, and other outdoor activities. I think this is a testament that plastic components or not 7002 is good... and will last me a other 10 years before service... because it keeps good time.

Cheers!! Just my opinion.

Image





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#18 ·
I have a 7002-7020 since 1994-95 when I bought it in Seiko HongKong and still running good. Only serviced once in 2016 Seiko Service Center. I used it a few times scuba diving and many times just swimming at the beach or at the swimming pool, and other outdoor activities. I think this is a testament that plastic components or not 7002 is good... and will last me a other 10 years before service... because it keeps good time.

Cheers!! Just my opinion.

Image



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really a great looking watch - thanks for sharing your testimonial ....
 
#22 ·
Ivor,

I just realized that you lost the intermediate wheel for day corrector...so the 7s26 has 9 plastic parts!

Also the 7002 only has one moving plastic part, the intermediate wheel and I've never seen that break.

The 7s26 evolved from the 7009, not the 7002 even though they share some parts.
 
#23 ·
You're quite correct Peter, when i took the day / date wheels and guard off, i was sure there should have been another plastic wheel there somewhere. How its done a runner i have no idea, as the day wheel should have kept it in place. That said its one out of a Ramon special, so who knows what its been through before it ended up in my parts drawer.

I think i put in my conclusion that the 7002 only has 1 moving plastic part, the intermediate date wheel. I have seen 1 or 2 with chewed teeth, and i replace them for the steel ones out of the earlier 7009's
 
#33 ·
Wow, that was a very thorough investigation. The only plastic parts they gave me trouble with mine, were the very thin movement and dial spacers. If someone ever takes the time to design a 7S movement spacer for that case, it could be very interesting in the aftermarket world.


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#35 ·
They have their issues but they're basically good watches.

I've bought and sold hundreds of the divers and done up customer's ones.

The barrel arbors don't chop through the plates like many 6309s do.

The glasses are a nightmare but I use generic 2.5mm glasses and seal them in.
That plastic date wheel can get ruined.
Date discs (there are new AM ones) are hard to get.
The two piece stem/crown stops working on some.
AM stems are two thin where they go in the plate (I have a fix)
Timekeeping is unlikely to be great. I usually get 6309s to go better
The rotor bearings don't often last a long time.
The ratchet wheel centers wear out as do the pawls.
Occasionally the setting work spring will break.
The plates can bend and reduce wheel endplay.

All that aside.....I like them:D