/fa/ - Fashion

>>14848958
I still come to these threads sometimes but there's not a lot of point any more.

>>14039542

>>13770737
some watches go hmmmm

>>13737303
Modern Bulova is not great. Their 262khz UHF movement is kind of interesting - a sorta-HAQ movement at a pretty reasonable price. 262khz is to my knowledge the highest frequency quartz oscillator (or indeed any oscillator) used for timekeeping available in any current production watch. The designs are meh. The old Bulova tuning forks are of course excellent with the exception of the 221x series.

>>13722010
> This is not watchmaking

>>13705079
yes, good bulova

>>13702388
>That's spring drive levels of sexy
It is a very pleasing sweep, although in fact it ticks 341 times per second, rather than sweeping smoothly like a spring drive or a 5S21/5S42 >>13702319

>>13674678
What you're describing sounds kind of like an accuquartz. The fork tine that's driven by the quartz oscillator is (I think) not the one with the pawl, so you kind of have two oscillators, one directly quartz driven, and one indirectly quartz driven.

>>13599667
6/4
This is a Bulova Accuquartz 224. Towards the end of the tuning fork era and starting well into the quartz crisis, Bulova corporate did not take the threat of quartz seriously. Eventually, they retrofitted the Accutron 218 into a quartz movement. It still used a tuning fork, index pawl, and index wheel to advance the gear train, but instead of the tuning fork running at its natural frequency, a quartz timing circuit forced the fork to run at 341.33Hz. This is in some sense not too different from how Seiko Spring Drive, the Luch 3055, or the Timex model 62 work - a quartz resonator governs the frequency of a more traditional escapement. You can see the design on the dial is a picture of a quartz crystal (other brands did this as well - Seiko most famously, Longines as well on their ultraquartz, some others). The huge majority of the watch is parts-compatible with the 218, which saved on development and manufacturing costs.

>>13520749
The accutron 2210 was created in 1973, well over a decade after the first accutron 214 and at a point when the writing was clearly on the wall for tuning forks. Bulova as a company did not strategically position themselves for the quartz crisis. They made a half heartes attempt with the accuquartz 224, but it was too little, too late.

>>13506642
>>13506654

>>13485311
Not at all. The accutrons have the index finger that advances the index wheel attached directly to the tuning fork, and moves back and forth when the fork moves to index the wheel. On the other hand this means 5he index wheel is an exposed part, as opposed to locked in a micromotor box, and is easily destroyed. The tuning fork index wheels of the 1960s and early 70s may be among the very most precisely machined parts in the world up to that date. To this day the method of creating the accutron index wheels is a trade secret. Here you can see the index fingers indexing the wheel in an accuquartz 224 (essentially a quartz-governed accutron 218, mentioned above, and largely parts-compatibke with the 218, including the index wheel).