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Discussion Starter · #1 · (Edited)
As I am finishing up (for now) my research on the mechanical World Time watches from Seiko - I am finding myself more and more interested in what came next - in this case specifically the Digital / LCD World Times that Seiko produced from 1977 through some point in the 1990's (to be determined).

I am starting at absolute zero here - I knew nothing about these watches a few days ago, so there is a very high likelihood that my current assumptions are not correct. I am hoping some other owners / enthusiasts can help me get this all straight! Thankfully there are a lot of catalog scans of this watch - helping me get started.

I believe there were essentially 4 watches here - going something like this:
  1. M158-500X - The original PAN AM, Lemon colored LCD
    • 1977 - 1979
    • One dial version has city names abbreviated
    • Another dial version spells out the city names
  2. A358-500X
    • 1980 - 1982 ?
    • The follow-up to the gen 1, gets an Alarm function
    • Looks like we get a new LCD panel
  3. A239-50XX
    • Dec 1979 - 1982 ?
    • This is a completely different watch
    • Sold along side the A358
    • Had two layer LCD - so you could set the time zone using a world map screen
  4. A7X8-50XX
    • 1984 - 1990 ?
    • This is the 3rd gen of the original watch
    • Gets full city names on the dial/bezel
    • I have seen A708 and A718 versions - not sure the difference?
    • Is this the last LCD world time from Seiko?
Please help me get this correct!

Here's the start of a Google Doc:
 

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Discussion Starter · #6 ·
Here's my latest acquisition (the A718 at right):



And....

(drum-roll) ....

I've (finally) put up a first revision/post on the M158-500X:


I've also put up the ad/catalog scans that I could find:


If you spot anything that isn't correct, typos etc - please let me know.
 

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Thanks for putting this together. I've always been interested in these! Oh, and too bad Sanger Harris was out of business by 2009. I wonder how they would have responded to the "reprogramming" offer?

Sent from my SM-N986U1 using Tapatalk
 

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Discussion Starter · #8 ·
I have an A239-502A in the mail... that's the one with the full map display dual LCD. I will post a photo of that when it arrives - after some small clean-up and attempts at repair.

As for reprogramming, you really just have to figure the leap year offset, if I recall I set the year to 1981 (in 2021) and everything is happy. It would be fun to bring it back to the jeweler for the reaction. Like so many things, their guarantees are only as good as their businesses... which usually means not great.

on the PAN AM - I am surprised (shocked even) at how many copies were made - with various brand names - many meant to look like the PAN AM with the dial frame of cities and time zones, but then no world time complication on the actual watch! I am working on an index of these watches at the moment. They seem to offer solid evidence that the PAN AM was a very popular watch that was easy to sell and something people wanted to be seen wearing (even if not real).
 

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Discussion Starter · #9 ·
Here's a write-up on the copies of the PAN AM that you can find out there right now with very little effort. If you know of any others please send me links and or photos!

 

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Discussion Starter · #11 ·
My A239 arrived a little more quickly than I was expecting. It is going to need a real good cleaning at some point - but is in great shape.

I'm the second owner:



I am surprised how much smaller the A239 and the A718 are next to the PAN AM.



And on the wrist





I'm still in the market for the black dial frame version of this watch, ideally marked WORLD TIME ALARM, instead of just WORLD TIME.
 

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Here is the info you requested on the other forum. I'm uploading the image here because it's a little less time consuming.
1980 Quartz Casing Guide

Handwriting Font Paper Paper product Document


Handwriting Font Book Material property Rectangle
 

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Discussion Starter · #13 ·
Here is the info you requested on the other forum. I'm uploading the image here because it's a little less time consuming.
1980 Quartz Casing Guide

View attachment 488754

View attachment 488755

Wow - Thank you! I will spend some time this weekend deciphering codes to figure out which color lcd's went in which cases.

If its not to much hassle can you post up the same info on the A358-500X (should be same years), and if its in there the M158-500X?
 

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Always thought lemon went into the gold and gray went into silver. While true for calibers like A158 or A159, clearly doesn't work with a number of Seikos, lemonface and Pan Am for starters

Rob

Sent from my SM-G996U using Tapatalk
 

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Discussion Starter · #15 ·
@SeikoPsycho2 - Thank you for these.

There are two curious omissions, the A239-502A (very common) and the A239-5020 (less common)... I have found watches from 1979 for both of these, 1980 for the 502A, but not yet the 5020 in a 1980 case (so far):

A239-502A from 1980
Wood Button Water Dead bolt Asphalt


A239-5020 from 1979
Watch Analog watch Watch accessory Clock Gadget
 

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Craftsman
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Generally, from my observations, the casing guides sometimes run a year or so behind the model year. I also have some other Quartz casing guides. I'll see if the other models you're interested in are listed.
 

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Here is the info on the 358-500X

Font Material property Handwriting Paper Number
 

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Discussion Starter · #18 ·
This is very helpful. Here is what I have so far:

(SS=Stainless Steel, SGP=Gold Plated)

M158-5009:
- Correct SS Bracelet Z-129
- Correct SGP Bracelet Z-129

A358-5000:
- Correct SS Bracelet Z-309 - Black and White Dial Frames
- Correct SGP Bracelet Z-309 - Black Dial Frame

A358-5009:
  • Correct SS Bracelet B-487 - White Dial Frame (apparently no Black Frame on this model!)
  • Correct SGP Bracelet B-487 - Black Dial Frame

A239-5000:
  • Correct SS Bracelet Z-330 - Black Dial Frame, Correct Map LCD: Black
  • Correct SGP Bracelet Z-330 - Brown Dial Frame, Correct Map LCD: Red

A239-5009:
  • Correct SS Bracelet Z-330 - Black Dial Frame, Correct Map LCD: Black
  • Correct SGP Bracelet Z-330 - Brown Dial Frame, Correct Map LCD: Red

A239-5010:
  • Correct SS Bracelet Z-330 - Blue Dial Frame
  • Correct Map LCD: Green

Here is what I am still missing:

- M158-5000 (maybe in the 1979 or 1978 guide?)
- The A239-502A and A239-5020 (maybe in the 1981 guide?)
- The A708 and A718 (perhaps in the 1984 or 1985 guide?)
 

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Discussion Starter · #19 ·
And the missing ones I have not yet seen casing guides for, but based on image data collected to date:

M158-5000
  • Correct SS Bracelet XAS020
  • No SGP version

A239-502A
  • Correct SS Bracelet GA950 - Blue Dial Frame, Correct Map LCD: Black
  • No SGP version

A239-5020
  • Correct SS Bracelet GA950 or XGA950L - Black Dial Frame, Correct Map LCD: Black
  • Correct SGP Bracelet GA04A - Brown Dial Frame, Correct Map LCD: Red

A708-5000
  • Correct SS Bracelet YA24A - Black Dial Frame
  • Correct SGP Bracelet YA23A(-E) - Gilt Dial Frame

A718-5010
- No clue (yet)

A718-5030
  • Correct SS Bracelet G1106 - Black Dial Frame
  • Correct SGP Bracelet G1106 - Gilt Dial Frame

And for posterity sake, here are the replacement batteries:

M158 - SR1130W or 389
A239 - SR927W or 395
A358 - SR1120W or 391
A708 - CR2016
A718 - CR2016
 

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Discussion Starter · #20 ·
Several updates:

The digital collection now counts 4:





I have another 8 (ya, eight more) in the mail - TBD which will be for parts vs working examples... More on that soon.

I've also updated the website to support the Digital series properly. And a few new articles:




After some more wrist time with the A239, that will likely be the next bit of content. There is a lot to unpack with the A239 - at least five model numbers, and lots of small tweaks.
 
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