Leaderboard

Centre wheel has been found to have 12 pinion leaves each one transitioning every 5 minutes. Barrel has been found to be tilting due to worn bottom arbor hole. The tilting causes the meshing of the teeth to become tight (dropping amplitude) as the barrel tooth transits across the pinion leaf. I can see wear points on the brass barrel teeth indicating that. I am going to close the barrel arbor hole with a rounded punch to try and get the barrel to run flatter. Will post progress soon.

You might all find this interesting.

If you have the bestfit book you would know there's something called the fingerprint system at least I think that's what it's called. Specifically the setting parts of most early watches are all unique. So you can look up your setting parts and see if it matches anything. If somebody on the group was being nice and helping you out then it would be really nice if it give them a diameter size. Because otherwise I would have to look at all of the 16 through 19 to see if I can find it as opposed to you would give us the size. Then it would be nice if you took the screw off the setting parts and put those so I can see those better. Like I like Tbilisi the lever underneath. Then worst-case if we can't find it you get the measurements of the balance staff we can see if we find anything close. Because there are some reference material out there that lists staffs by size. It would be a lot easier to modify an existing staff then to make it only one.

My starter for ten.

Many railway pocket watches had a fail safe design so the hands could not be adjusted by mistake another design for the same purpose was the lever set . Looking forward to the next vid.

I have a handful of these. I chuck them up in my Dremel and used them for inlay on guitar/bass fretboards. Works best in harder woods, and on the inlays themselves (metals and shell mostly, occasionally bone) and only for really fine detail/cleanup.

These are all the new digital toys. The next generation of dentists will practise a totally different brand of dentistry. Starting from the moment you approach the clinic, facial recognition software will alert the staff as to who is coming. You will be greeted by your name. Before you even sit in the dental chair, a series of digital xray scans will be taken. Next, an intra-oral scan of your mouth will be taken. Diagnostic software will merge the xrays and optical scans and do a full analysis of your dental condition, from gum disease, tooth decay, crooked teeth, buried wisdom teeth, etc. If I were going to work another 10 years, I would consider going full digital. But as I'm planning on retiring soon, I can only dream on. Imagine what can be done on a quite day with such toys... Scan a broken part and 3D print the part in metal! Mill your own watch case out of a block of zirconia and fire it in the furnace.

Here's a recent video about building a quality studio microphone. Some parts might be of interest when building the amp for a watch timing machine.

Like this

Yes, it would have to be exact. First of all, it uses this poor design (as Clockboy rightly says) as there is only space for that size jewel, with that odd mounting, there. And there would be no way to open the hole to take a larger jewel there wouldn't be the material to hold it (and it would be too big, period). Older models of ETA sometimes had a bushing at this location; the bushing is hourglass shaped, with a lot more contact in the plate.

It can be pushed out and in just fine with normal stumps and pushers. The seating in the plate is machined during manufacture with a 3 point hold, there's no way to ream a partial hole like this.

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Record_43

That's because when you wind the spring up you are also tightening the arbor on the shaft.

Yes there supposed unscrew. Sometimes like the link above shows they even put nifty holes that you can use to unscrew the arbor part. But unfortunately sometimes for unknown reasons it does not unscrew.

This is my ref 16223. Sent it in for service/repair. It's gonna be a month or more but it'll be coming back. Hopefully looking and working great. Fingers (and eyes) crossed.

The case looks good. A good bees wax polish to feed the wood should be all that is needed. Those synthetic polishes like Mr. Sheen I wouldn’t recommend them.