Chronograph

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
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Omega Seamaster Chronograph 145.016-68

One of the more unusual jobs that came in at the end of last year was this Omega Seamaster chronograph. The Seamaster chronograph is a lot less common than the Speedmaster chronograph or moonwatch as it’s become known. This example is from 1968 and as such would be classified as a pre moon watch if it were a Speedmaster. It’s powered by Omegas calibre 861, cam operated, three register chronograph movement. The watch itself is in lovely condition and just needed a service carried out to get it functioning as it should do.

P1080511a (more…)

Sinn/Bell & Ross chronograph

Although I’m still very busy right now I couldn’t let this one pass without featuring it, it’s a beautiful Sinn/Bell & Ross Bundeswehr type chronograph powered by a Lemania calibre 5100 movement. This movement was released in 1978, although Omega produced Lemania 5100 based Speedmasters from 1974 so the movement itself was around before Lemania made it available to everyone. Sinn, Fortis and Tutima were Lemanias biggest customers and they supplied the military with various chronographs based on the 5100. The reason the military liked the 5100 was due to it being a simply constructed but rugged movement, there were no fragile chronograph coupling wheels in this calibre, the chronograph is directly driven via a vertical clutch. This along with the nylon movement spacer blocks give it excellent shock protection, however despite its rugged construction from a watchmakers point of view it uses quite an antiquated type of pillar construction.

Lemania 5100 (more…)

Omega Speedmaster Calibre 321

I’ve written about the Omega Speedmaster before so I won’t delve into the history but it’s nice to have a pre moon one on the bench with the original calibre 321 movement inside. This one dates from about 1967 according to the serial number and as such is know as the ‘pre moon’ because it pre dates the Apollo moon landings. This example came in for a spruce up, a service and to sort a couple of niggles.

Omega Speedmaster calibre 321 (more…)

Seiko 6138-7000 slide rule

I thought I’d feature this 6138-7000 because it’s a variation of Seikos twin register chronograph that isn’t seen very often. It’s unusual in as much as it has a slide rule bezel and indicator much like the contemporary Breitling Navitimers, although quite how pilots were meant to operate it whilst flying a plane I’m not entirely sure! This example came in for a bit of a smarten up and a full movement service.

Seiko 6138-7000 slide rule (more…)

Junghans J30BZ cockpit chronograph

Todays article features a Junghans cockpit chronograph which dates from the WWII era. It arrived in a bit of a sorry state, flooded with oil, quite a few parts missing and it’s been hacked about a bit in its long life with scratched plates and bruised screws. However the fact it survives at all is a minor miracle! The brief was to try and get it running, but not to throw too much (any!) money at it. It came with a donor movement which provided all the missing parts. The instrument itself has a rotatable ‘count up’ bezel a chronograph with a centre seconds sweep and 15 minute sub register. The chronograph hands weren’t delivered with the watch but I’m assured the owner has a set. The knurled wheel at 6 o’clock serves two functions, the first is to wind it up, the second is activated by pulling the cord attached to a lever by the wheel. Once this is pulled down the wheel can be used to set the time, once it’s set the lever can be pushed back in. The brass button below the wheel starts, stops and resets the chronograph.

Junghans J30BZ chronograph (more…)