Tuesday, December 29, 2009

Restoring the Casio DW-5000C G-Shock

The Casio DW-5000C is the first ever G-Shock and was created by the team “tough” which was a team of Japanese engineers employed by Casio. The initial idea was that the watch (unlike watches of that time) would be tough. During the early 80ies the main direction of digital watches were thin and “pretty”, these were more fragile and did not survive “unfriendly or harsh use” and would often “get banged up”. The digital watches were considered to be more of jewellery than timepieces.

The DW-5000 I bought off an internet auction was in pretty good shape. The watch did not have the bezel and a broken resin band, there were small scratches on the display as well as on the case back. All the functions of the watch are good including the light.


Photo by The Watching


Photo by The Watching

The “though team” wanted a watch that could not only be used by people who did not have an active life, but by people that did. The watch was meant to be used by people with “active” jobs, like construction workers and also while trekking or climbing. The team came up with “The triple ten” idea in 1981. This meant that the watch they were about to design would 1. Have a 10 year battery. 2. Have a water resistance up to 10 atmospheres, and 3. Would endure a drop from 10 meters. The “G” in G-shock means that the watch can suffer a shock from fall as the hardest chock for a human being.

One should keep in mind that this watch is 25 years old and would have seen some “action” as it is a sports watch. I began by buffing the case back so that smaller scratches would disappear. I used a diamond compound for the scratches, first one with 3 micron then finished with 1/4 micron. The results came out pretty good. My future recommendations would be not to use 3 microns to begin with but maybe 1 or 2 and just be at it longer so that there’s no risk of uneven grinding.

Photo by The Watching

I was lucky that the screws came off easy this is often a problem on old G-shock as they get stuck and broken off. I ordered a new bezel and resin band on the net.

Photo by The Watching

When the DW-5000 first came out on the market in 1983 it was not a big success and very few units were sold. Especially the Japanese market did not approve to such a daring model that we now know were ahead of its time. It took a year and a second chance for the team as they came up with the DW-5200 “Hero” in 1984. The watch was essentially the same as the DW-5000 (equipped with the same module 240) but this time people were ready. It became a success in England mostly because of a hockey commercial where a player “slap shoots” the watch into goal.

The DW-5600 has the same bezel and band (and can still be found on the net) as the DW-5000 and can therefore be used as replacement parts. The assemble of the watch was easy as the screws had come off and it only took a couple of minutes.

Photo by The Watching

As the interest grew abroad the Japanese market followed and G-shock soon became a popular watch. Since the early 80ies the G-shock has evolved and today it comes in many different varieties and models.

The end result is very good and it’s a nice watch to wear.

Photo by The Watching



Photo by The Watching

Sunday, December 20, 2009

Repairing the Tärnan MS 80

The Tärnan watch that I won at a Swedish auction site did not work when I got it. It was obvious that some pieces were missing from the watch as it arrived with a matchbox with pieces in it.

Photo by the watching

The pieces were a small screw (don’t know where it fits), the second hand and a piece from the keyless works (the set lever).

Photo by the watching

I decided to take the watch apart for ultrasonic cleaning and then oiling and putting it together again. I used a hand remover so that I could remove the dial from the movement.

Photo by the watching

When I was putting the date works together again the spring for the “date wheel click” disappeared in one shot and I had to replace it with a slightly modified one I luckily had as a spare. I found the caliber number on the movement; it seemed that it was a France Ebauches, Caliber 233-66, from the sixties.

Photo by the watching

Finally I cleaned the dial up some and replaced the old crystal with a new one.

Photo by the watching

I think the results are pretty good considering that the dial was a bit banged up.