in order to buy appropriate spares in my attempt to service an Omega 175.0083 (7750) I need some advice:
I've already been suggested to replace MS:
Barrel is Ok and I'm thinking of buying a new MS and moebius 8217 for barrel lubricating as I don't want to spend money on recommended Kluber 125 grease.
Should I consider instead buying a barrel complete (assuming Barrel complete (180.1) comes with MS installed) wich supposedly comes prelubricated ?
Attached image shows automatic device bridge with evident sign of wear from where, to my understanding, the problem orginated: a screw came off
I cant find original part.
ETA part is different from Omega in that the Omega is larger and partially covers hammer two function and the chronograph cam.
Beside that and since the watch has no crystal back case I think those parts are perfectly interchangeable.
Do I need to replace the bridge or are there alternative aproaches to this problem?
I am servicing my first 7750 (thank you Mark for the YT videos and Lawson for the Disassembly/Assembly walk-through).
The movement is not new - let's say it has an obscure unknown history It appears to be a genuine swiss 7750, but with a lower grade finish (very low...)
When putting back the balance stones I noticed that there were two sizes (two pairs, because the cap stones fit the hole jewel settings). I put the smaller stone and hole-jewel on the mainplate and the larger ones on the balance cock. I tried to but the larger setting on the mainplate but it didn't fit quite right. I believe the springs are the same size - its just the stones that differ a bit (aprox 0.1mm)
So my question is: did any of you stumbled upon the same issue? Is it normal for a 7750 to have two different stone sizes?
Hey, guys, I have a 7750 movement where the rotor screw snapped off. I opened it up and it appears the rest of the screw is still inside the rotor post. Is there anything I can do to screw it back out?
My experience with the handheld cheap Chinese glass presses on eBay is truly poor, and I've come to learn that I'm not alone. Yesterday I was struggling with it for over 30 minutes to fit an armoured glass in a Vostok Amphibian before giving up. At that point, while still holding it in my hand looking at it with disdain, I thought: "What a piece of utter rubbish!".
Anyway, what I'd really want would be a Robus press, but gosh, that would be over £500 with the die set (tax included, excluding shipping)! So, I found this tool "Professional spindle press for housings and glasses with twenty-four inserts" on eBay for £72. It sure sounds promising, but it would be great with a review, or if none can be had your opinion.
Sharpening is a science and an industry. Trivia facts follow
An important figure in drill sharpening is Joseph Mazoff, a self-taught American. His article is still current on the matter and the basis for most sharpeners, I have attached it here.
A 1st brand drill bit sharpener can cost €600 https://www.wabeco-remscheid.de/catalog/product/view/id/6710/s/spiralbohrer-schleifmaschine/category/487/
It's Chinese copy, one half of that https://www.aliexpress.com/item/Drill-Bit-Electric-Big-Grinder-MR-13A-CNC-drilling-cutter-grinding-machines-with-ER11-collects/32867482062.html
If you have something that cuts there is a professional way to sharpen it. Blunt axe? No problem https://www.sharpening.org.uk/product/tormek-sva-170-axe-grinding-jig/
I'm currently disputing an Amazon seller that sent a cheap knife sharpener instead of a 75mm grinding wheel
A relic of the Jewel Wars, this 35mm 1950s Mount Royal with an 80 jewels (kind of) Felsa 4002, 21 of which are broadly functional and 59 which, er, aren’t. I’ve no idea how many of these watches survive today or, indeed, were ever made but it “coulda been a contender” until the likes of Waltham, Orient, and Titoni climbed into the ring with their 100 (and more) jewelled efforts.
Of the two recorded makers of a Mount Royal brand, Choisi seems to be the most likely candidate for today’s curiosity, it being a product of the original company founded in 1929 before its demise, date unknown. The company name was seemingly reactivated in 2013 by a Singapore-owned enterprise which, from what I can see, is largely producing retro-style watches along with homages based on the old company’s vintage models.