Category Archives for Chronograph

Not a commonly seen model, the hexagon case 6139 is a rarely seen among the series, and I am lucky enough to have one of these. 

The case is a bit over-polished, but that's ok as it still keeps the shape properly.  I had seen some been polished to a state that all the lines had disappeared, that is completely rounded.  The dial is original and shows some ages on that.  Not planning to touch that part for it being a very high risk of destroying the finish, so I've decided to leave it as is.  The movement is excellent, probably one of the best one among all the 6139 I have.  The chronograph function works perfectly, and the needle can swing back to 12 o'clock position precisely.  A lube job is planned for this beauty to keep it in shape.

Bracelet is original, and is the one shipped with this model.  A bit of proper treatment is needed to restore the original finish of it and the signed clasp.  That's about it.  A stunner to keep indeed.

This 6139 is not something that Seiko originally brought out, it is in fact a piece that being put together with parts from different variants of the 6139 series.  People usually call this kind of watches Frankenstein watch, or in this case a FrankenSeiko.

With a good running 6139 inside, it has a 7100 Vader dial and hands, an early 6010 case, a Chinese Kanji day wheel, and lastly a caseback from a relatively less seen 7011. Really one of a kind.  Although the watch right here has parts from 'at least' 4 different watches, they all do work together without any need of modification or alteration.  They are all from the 6139 series, and most of the time original parts can be shared among them.  This 6139 is a very good example.

Fake parts are not acceptable.  But if one was built with genuine parts to form a Frankenstein, and if you do it right, it could be a very nice 'one of a kind' model.  Just do it right.

The 6139 is one of the most well-known classic chrono caliber Seiko offers.  Introduced in the late sixties, this had been used in a series of their sports series, and was the world's first automatic chronograph.

There are only two timekeeping hands, for hours and minutes indication.  No seconds hand. However, while using the it as a chronograph, the long hands initially pointing at the 12 o'clock position, will start moving and works as second counter.  The smaller round dial at the 6 o'clock position works as minutes counter.  The two buttons on the right works as the start/stop and reset buttons.  For day and date quick setting, this can be done by the two stage pressing from the crown, a full pressing of the crown will quick set the day, and half press will set the date.

The variants of the 6139 had gained a lot in popularity over the years and almost every models are now collectible items.