Leaderboard

I think the best option would be looking for a supplier of jewels for industrial purposes there are plenty about: http://www.true-point.co.uk/ the above supplier has jewels in the range of sizes you would require.

Nice sunburst dial, and I've always preferred sub seconds in a dress watch. The movement reminds me of the AS 1130 J

At 2:10 the guy picks up a bridge with bare hands, drops it, hits the holder on the 2nd try... I felt reassured about my technique LoL.

Hi and welcome to WRT forum.

Hi and welcome to the forum. Get yourself a Seiko 5, there are zillions out there and cost very little.

Another bargain bin HMT - this time a Kohinoor. It looks like a nice clean example with no frankne-nonsense. No doubt in need of a service (and a new strap). I blew the budget slightly for this one, but I think it was worth the extra quid.

Hi I have attached the pics of the amplifier setup I dont know if the radioshack telephone amplifier is available in the UK any more but there must be others that will work, With the loss of Tandy and Maplins these sort of bits are hard to come by, Might get them off the net .

Also waiting in the wings (pun intended) is this near identical white dial version. I've not had a chance to work on that one yet, but it is probably going to be the next victim on the healing bench.

Wingman today https://i.imgur.com/yWx1V3f.jpg

An "almost new" HMT Janata today. It did require a service and a bit of a polish to get it to this state, but I'm pretty pleased with the result. This one appears to be completely original. I have a bunch more HMTs waiting in the wings to join the 404 club, I'm just a little short of that all important ingredient "spare time" at the moment. I'll post the rest when I get a chance to work on them.

Nice video! I have the same Bergeon 5500 press with the A-set of aluminium dies, it's a very old set and the box is branded Favorite even though the tool pictured on the box is Bergeon. It's one of my favourite tools to use.

Some parts are interchangeable between calibres in the same model family and some aren't. The Jules Borel web site has a very useful facility for working out what parts will fit what movements. http://cgi.julesborel.com/ The beat rate of a movement is determined by the balance assembly and is primarily a function of the inertia of the balance wheel (determined by the size and mass of the wheel) and the length and strength of the hair spring. It is a specific design feature of any given movement. So I happen to have an 1803 and a 1950 in my to do box at the moment, so with a spare half hour this evening I did some tooth counting..... With both of these movements the center seconds wheel drives directly off the escape wheel pinion. On the 1803 the the Center seconds wheel has 80 teeth and the escape wheel pinion has 8 leaves, so the escape wheel rotates at 10rpm. The escape wheel has 15 teeth, so that's 150 teeth passing through the pallet per minute, which is 2.5 teeth per second. It takes 2 beats of the balance to get 1 tooth through the pallets, so that's 5 beats per second, or 18000 BPH. On the 1950 the Center seconds wheel has 72 teeth and the escape wheel pinion has 6 leaves, so the escape wheel rotates at 12rpm. The escape wheel has 15 teeth, so that's 180 teeth passing through the pallet per minute, which is 3 teeth per second, so that's 6 beats of the balance per second, or 21600 BPH. If you use a 1950 escape wheel in an 1803 without changing anything else then you have the escape wheel turning at 10rpm (determined by the beat rate of the balance) but only 6 leaves instead of 8 leaves on the escape wheel pinion. This means that in 1 minute the escape wheel turns 10 revolutions, or 60 leaves leaves worth of engagement with the center seconds wheel, which has 80 teeth, so the seconds wheel will only make 0.75 of a full rotation. You need another 20 leaves worth of escape wheel pinion rotation to get one full rotation of the seconds wheel, which takes an additional 20 seconds. So with this combination it will take 1 minute 20 seconds for the seconds hand to make 1 revolution of the dial when the balance wheel rate is correct (18000BPH).