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…)

Timefactors Precista PRS-10

This Timefactors PRS-10 came in with a stopped movement and a cracked crystal recently. These watches are based on the military-issue Precista G10 from the early 1980s and even carry the same name on the dial due to the fact Eddie Platts (the Timefactors proprietor) actually owns the trademark. I presume the movement had stopped due to water ingress as the insides were very mucky and there was a whacking great stretch of crystal missing around the circumference!

Timefactors Precista PRS-10 (more…)

Seiko Gen 1

This Seiko 7A28-7120 chronograph came in for a full service, a new crystal and a seal change recently, it also had a problem with the chronograph minute counter which wasn’t working. More commonly referred to as the Seiko Gen 1 (generation 1) these were first issued by the MOD to British military pilots in October 1984 and weren’t replaced until November 1990. Seiko supplied a Gen 2 chronograph later on in the 1990’s. The Gen 1’s were also the first quartz powered chronographs issued by the MOD replacing the venerable mechanical Valjoux 7733 powered ones that were issued for the preceding decade or so. The MoD bought and issued a total of 11,307 Gen 1’s, which makes it one of the most popular issued military chronographs to date. This particular watch had been sent by the owner to Seiko UK for the work to be carried out but it was returned as they don’t carry the spare parts anymore, this was when it made its way to me. The movement has a crown at 8 and the start, stop and reset at 2, 4 and 10. The large seconds hand is the chronograph running seconds hand, the sub dial at three is the 1/10th second counter, the one at 9 is the minute counter and the one at 6 is the running seconds.

DSCN6488a (more…)