Chronograph

Lemania HS9 Chronograph calibre 15CHT

This lovely Lemania HS9 came in as a non runner recently for a spot of fettling and a service. These models are known as the HS9 after the engraving on the caseback. HS stands for Hydrographic Supplies (or Services), a government organisation tasked with the procurement of timepieces (and other devices) for the Navy. The 9 is the number of the specification that this watch was made to meet which was a wrist chronograph. Specifications 1 to 8 included normal wristwatches, deck chronometers, pocket watches and so forth. So this model is made for the UK government for issue to the Royal Navy Fleet Air Arm. This one is a silver dialled example but they did come issued with a white dial (with no luminous compound) for use on nuclear submarines and black dialed ones were issued to the RAF. These Lemania models were supplied to many armed forces the world over and are one of the nicest issued military watches in my opinion. It’s powered by the beautiful manual wind, 18,000bpm Lemania 15CHT movement. The dial has everything going for it, it’s Lemania signed with the company logo above, below that is the T – circle logo indicating the luminous compound is tritium based (rather than earlier radium), it has the broad arrow above the 6 denoting it was government property and it doesn’t have the long dash of luminous compound at the six o’clock marker which is sometimes seen. The crown isn’t the original but the style does suit the watch so it’s not too big a deal.

Lemania HS9 calbre 15 CHT (more…)

Seiko 6138/9 sweep hand issues

Hello everyone! To start with, apologies for the lack of updates over the past few months but it’s been very hectic here on a personal level as well as a business one. Without going into too much detail my parents were involved in quite a serious car crash at the beginning of the summer, my father escaped relatively unscathed but my mother and a passenger weren’t so lucky. Thankfully they’re both back home now but my mother was in hospital for three months and is now having to learn to walk again, which at the age of 80 is going to take some time. As if this wasn’t enough at the beginning of September my partners father suddenly and unexpectedly died, this was a huge shock and taking care of his wife and all the things that a death in the family brings with it has taken some time. I’ve been working seven days a week (when I’ve been home) to try and keep on top of the work queue and things are slowly getting back to normal.

Anyway I thought I’d do a little informational post on something I see on a regular basis and that’s misaligned 6138/9 sweep hands. The bullhead pictured below came in for a movement service but as you can see the sweep hand consistently resets to the 1 second past position which means it’s been fitted incorrectly.

6138-0040 (more…)

Seiko 5717-8990 one button chronograph

This lovely one button chronograph came in recently a little the worst for wear. The 5717-8990 is a 21 jewel, manual wind 18,000bph single button chronograph. The 5717 signifies the movement has a date complication, models of these without a date are powered by the 5719 movement. The 5719 and 5717’s were brought to market on the back of the 1964 summer olympic games in Tokyo where Seiko were the official timekeepers. The early ones had an olympic torch stamped or etched on the caseback, but later ones can be seen with the seahorse design or the standard horseshoe type. There are also versions with the Asian games torch and the Military anchor so there are quite a few variants to choose from.The chap who sent this in received the watch as an engagement present from his fiancée in 1965 and the watch had been worn for many years until the pusher was lost and he was told no spares were available for that model anymore. As is usual in these cases the watch was consigned to a drawer for many years until it eventually made its way to me. Superficially the watch isn’t in too bad a shape but obviously the chronograph start/stop/reset button is missing and the crystal’s rather scuffed.

Seiko 5717-8990 (more…)

Thermidor chronograph calibre 12

This charming Thermidor twin register chronograph came in for a service recently. What’s interesting about this watch is it’s powered by a Calibre 12 movement, the calibre 11 which preceded it was developed by the ‘Chronomatic’ partnership of Heuer, Breitling, Hamilton-Buren and Dubois-Depraz in an attempt to be the first to the market with an automatic winding chronograph. The calibre 11 was revealed to the press on March 3 1969 in press conferences in NewYork and Geneva and was manufactured until about 1973. The calibre 12 was introduced in 1971 and was produced until 1980. The calibre 12 addressed a few of the issues that appeared with the calibre 11’s, modifications included using lighter jumper springs, a weaker mainspring to drive a redesigned date mechanism, some strengthening of various levers and hammers and a faster beat rate of 21,600 as opposed to the cal 11’s 19,800. This Thermidor cased example has a typically bright seventies style dial and handset design, and you can also see one of the cal 11/12’s more striking features, a 9 o’clock crown.

Thermidor chronograph calibre 12 (more…)

Heuer 266.006-1 quartz with Dubios-Depraz 2000 chronograph module

This Heuer 2000 quartz chronograph came in recently for a service, the watch ran with the chronograph running but spluttered to a halt with it disengaged. This particular Heuer is a modular chronograph meaning the movement powers a separate chronograph module fixed on where the dial would usually sit. Modular chrono’s are usually easily identifiable by the crown being below the line of the pushers. This one is powered by a slightly modified ETA 555.282 quartz movement and the chronograph module is a Dubios-Depraz 2000, these find their way into quite a number of manufacturers chronograph models.

Heuer 266.006-1 quartz with Dubios-Depraz 2000 chronograph module (more…)

Seiko 6138-0010 chronograph

This very early Seiko 6138-0010 “UFO” came in recently for some attention. The owner had bought it in 1971 when he was working as a race mechanic for the Tyrell formula one team when they were in Japan that season. He saw it on the wrist of a Japanese mechanic working for one of the other teams and fell in love with it so a deal was struck. It was worn continuously throughout his career and he eventually ended up running his own engineering firm that produced parts for race teams. The watch was regularly serviced until a number of years ago when he was told it wasn’t possible to get the parts anymore. He took it to a couple of watchmakers in the intervening years to try and get it resurrected but ultimately all that happened was it was returned not working with some parts missing! Having sold his company and taking life a little easier his thoughts came back to getting the watch repaired and this is where I come in.

The watch itself is a Japanese domestic market version of a model that has since been given the nickname “UFO”, the 0010 designation shows it was the Japanese “Speedtimer Sports” version. An early example like this is powered by the calibre 6138a, a hand windable automatic, 21 jewels, 21,600bph, twin register, column wheel with vertical clutch chronograph movement. The later models were powered by the calibre 6138b movement and there are a few subtle differences that I’ll point out later in the article.

Seiko 6138-0010 (more…)

Lorenz Lemania 5100 Chronograph

This Lorenz chronograph was a recent arrival in need of it’s worn winding pinion sorting out along with a movement service. Powered by the Lemania calibre 5100 movement it’s a handsome looking watch. I’ve written about the calibre 5100 before so I’ll skip the history and just say it’s a very robust movement and because of this was used to power a lot of military (and military influenced) watches.

Lorenz Lemania 5100
(more…)