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By Colditz
I have a flash shortcut to ETA labs 7750 calibre that showed assembly dis-assembly. It no longer works due to Adobe flash reaching EOL status. I visited ETA labs web site to see if there was an alternative and lo and behold no access to anything technical at all. Does anyone know how to get access to what we use to have access to? Looks like protectionism has escalated.
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By Mickeycz
Hello,
I'm new here and into watch/horology world as well. I recently tried to replace the dial on my 7750 watch.
1) Open the wathc case
2) removed rotor
3) removed stem (gentle push of remove stem pusher and pull the stem out)
4) removed the movement from the case
5) put movment to movement holder
6) removed hands
7) removed dial
8) put new dial
9) pressed the hands back, hovewer during setting it up I realized the movement is not running - even when I wind it up - it is solid/stable and not ticking at all..
Kind of out of ideas what can went wrong, the movement was functional correctly before..
Thank you for any ideas.
Mickey
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By Calvin
Hello guys..
I wanna ask..
How to adjust my eta valjoux 7750 movement to be faster..
Cause it slow 2-3 minute a day..
Do i just need to move this part to the (+) sign?? Thankyouu
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By RJC87
Hi guys! I have a watch that uses a Ronda 751 quartz movement (see pic). For those unfamiliar, it’s a small tonneau shaped movement - usually a woman’s size (5½ x 6¾ linge and 2.5mm thick) with the following specs:
Linge Size: 5½ x 6¾, 2.50mm thick
Hand Size: 120/70
Stem: 401-1237
Cell/Battery/Power Source: 379
Tap Size: 10 I’d like to replace it with a mechanical movement: I started off looking for a direct drop in replacement but it’s proved very difficult. I haven’t found any modern movements with the same dimensions (although to be fair I haven’t had much luck finding a comprehensive listing of modern movements available). As far as the vintage movements go, (from here: http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk) the ETA 2480 (http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&ETA_2482) is a good example of the vast majority of what’s available— the right dimensions but 1mm too thick. And for a 2.5mm movement, 1mm is a ton. The Tissot 530 (http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Tissot_530), and Enicar 672/678 (http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Enicar_672) are the 2 that seem closest but they are still a half mil too thick. And worse, even if it fits, where would I even begin looking for one? Does anyone one have any knowledge of a movement that would work or one I could modify a bit to fit? Or any idea the best place to look?? Thanks in advance for the help and I love the forum!!
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By Giuseppe
I'm having some unexpected behaviour from a eta 7750 that I'm trying to regulate after servicing.
I went through service procedure using correct lubricants.
Everything went fine. Actually I have some doubt on lubrication of incabloc wich I'm not sure I did correctly since I'm afraid that too much oil was placed in one of the two stones.
The fact is that when I finished I wasn't brave enough to clean and lubricate it again ... shame on me but I felt that task to be very very difficult.
Anyway after reassembling the watch I had it at my wrist for a week and it showed a great consistency at -10 sec a day.
It'a stop grade movement and resting at night in DU, DD 9UP and 3UP positions always showed something between -14 -6
I was very happy with that result and I thought that a little regulation would have brought it to a very fine time keeping.
Then I reopened the caseback and slightly moved etachron arm, that was resting in a nearly neutral position, in the + direction.
Nothing happened (measuring with timegrapher open source app)
Did it again, another slight push.
Nothing
? ok I must have gone the wrong direction, then pushed all the way toward -
Nothing happened.
Ok this is annoying, all the way toward +
nothing
here I am,
what I'm I missing?
How come moving the regulator arm from - to + does not make any variation?
I'm lost
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By Mattswatch · Posted
I was changing the hands on a Vostok 2415, and when I cased the watch up again, I found I could not return the stem and crown to the movement. What is strange, Is that if I take the movement out of the case the crown reengages just fine. The 2415 has a spring release stem, I am wondering if anybody else has ever had this problem with the same movement or with a similar movement, or has any ideas on how to fix this. -
By Mattswatch · Posted
Just joined the forum, I am a amateur watch repair enthusiant in college. I have been collecting since I was 13, and have recently gotten back into the repair side of it. -
Hello Everyone! Just wanted to say hi and introduce myself. Looking forward to being a member of this forum. Mark's fantastic YouTube channel brought me here. Looking forward to learning more and exchanging ideas and information. Best regards, Marek
Question
Displacement 0
Hello WRT! Glad to have found your site, the resources here are incredible for a beginning hobbyist like myself.
I purchased a project LeJour 7000 (Valjoux 7750 powered) that is currently running hilariously fast- something like +2 hours per day. I purchased it with the intent to drop in a modern, more decorated 7750.
The LeJour has a Day/Date dial (Seen here) but I've found a date-only 7750 that would fit the bill. Is it possible to use this movement and just add the day wheel from my current movement? Is the underlying hardware all there?
Even better, what is the best way to research the parts necessary to do the conversion?
Thanks all!
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