[mks4]

Hi all,

I bought a 6105-8000 a couple years ago before I was knowledgeable about Seiko. I took it out the other day and realized that it has a resist dial and a proof case back. Is it possible from the factory or likely someone swapped the caseback?

Everything is original otherwise (dial, hands, crown, bezel...even the waffle strap).

Thanks,
Mike


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[TheTigerUK]

What date is the does the case back state Mike ?

 

[mks4]

What date is the does the case back state Mike ?

Looks like May 1968. Funny as soon as I posted, I walked away and thought...I bet the caseback date would help. thanks!


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[TheTigerUK]

May 68 is early, i would have thought the dial would need to be proof.

 

[mks4]

May 68 is early, i would have thought the dial would need to be proof.

Or the caseback needs to be resist.


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[TheTigerUK]

Or the caseback needs to be resist.


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Yup, one or the other

 

[mks4]

Yup, one or the other

It's 850...so proof it is. Thanks for the info. Now, does my OCD get the better of me on something that only I know about or not? Something else to hunt for on ebay I guess. Alas...


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[John_D]

My money says that it is a post 1970 watch with an earlier case back fitted

 

[TheTigerUK]

What movement has it got Mike ? A or B

 

[mks4]

What movement has it got Mike ? A or B

You've stumped me...perhaps I'll open her up...or wait until Richard gives her a much needed service. But...let's face it, she needs a resist back. It was well bought so I'm not going to worry too much about it....and I'm not a seller unless I'm down to eating dog food...and even then...




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[TheTigerUK]

You've stumped me...perhaps I'll open her up...or wait until Richard gives her a much needed service. But...let's face it, she needs a resist back. It was well bought so I'm not going to worry too much about it....and I'm not a seller unless I'm down to eating dog food...and even then...



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You needent open up Mike, does it hack (B) if not (A)

 

[mks4]

You needent open up Mike, does it hack (B) if not (A)

Appears to be an A as there's no hacking....although it did "bob" in place one of the times. Needs a service...


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[Itau]

the case back can not be different from the dial, there must be the same in writing. One of the two has been changed. In 1968 che correct movement was 6105A, if inside there is an "A" i believe that case back is changed and dial is correct

 

[jringo8769]

well i have the same problem as you do....i was unable to find a very nice 6105 8000 proof dial and had to use a like new 8009 resist dial...to make yours right...you need to find the correct dial...or change the movement to the later 6105b movement and change the case back...you have a beautiful watch either way....God Bless John

 

[rileynp]

Or the caseback needs to be resist.

Wouldn't it be more likely that a later-produced part (the resist dial) would be added to the earlier watch (proof back with non-hacking, A movement), generally speaking? Also, dials are more likely to be replaced in service compared to case backs. One thing to check for is the date stamp on the back of the dial. If it varies quite a bit from the case's serial number, then that would be further evidence it was added to the watch later on. My money's on a swapped dial, but never say never, stranger things have happened, etc.

 

[jringo8769]

there is a date stamp on the dial....very cool...now i have to look at mine...great info Noah R....God Bless