Jump to content

Recommended Posts

Posted

Hey guys. I just found this lovely Longines 817.

image.png.b763d4ef61fc4c84e3f721db2895d300.png

image.png.88a568b60e1f48b4d72adb7e487f8454.png

I love the dial but the original gold plated case is a little bit oxidized (I dont know if that is the case? Anyway it does not look shine), I dont know how to gold plate a case and I certainly wont do that. Polishing the case will ruining the gold color of the case and I'm not sure it's a brass case or a steel one. Does anyone know how can I restore the case? I dont need it to be super shine and sharp. I want to keep the 'vintage' look of it but I want it to look clean without dark brown color. Thank you!

Posted
17 hours ago, Nucejoe said:

Are you sure there is any gold on the case?

Lmao. The seller said it's gold plated. Anyway any idea I can get this one shiner?

Posted
16 minutes ago, EatPeach said:

Lmao. The seller said it's gold plated. Anyway any idea I can get this one shiner?

The seller is.

Posted

The bezel ring and the crown looks like they been gold plated but the rest of the case looks suspiciously like an alloy, maybe brass. You probably can see what the case are made of by popping the case back off and there Longines usually have the data stamped, must say I never seen that case style on an 817 before either.
Anyhow think the polishing cloth @Rocket suggests is the way to go with softer metals.

  • Like 1
Posted
1 hour ago, HSL said:

The bezel ring and the crown looks like they been gold plated but the rest of the case looks suspiciously like an alloy, maybe brass. You probably can see what the case are made of by popping the case back off and there Longines usually have the data stamped, must say I never seen that case style on an 817 before either.
Anyhow think the polishing cloth @Rocket suggests is the way to go with softer metals.

Yeah will do. I just receive the item. The price is low. It only costs me $60. The movement it's real for sure, I didnt check the rest. However I dont think there's fake retro Longines. As for the case back reference number. It's 18892533. I think I will disassemble the case and deal with the bezel and the rest of the case respectively. For the brass parts I think some bushing and polishing should be OK?

Posted

Just a good clean and polish should be OK.
Your number is the serial number and inside the back you will then see a different number which is the case style.
The numbers looks like this.

1131 817 18k Gold (L817.4) 
1132 1 817 18k Gold (L817) 
4129 817 18k Gold-Plated (L817) 
4131 817 18k Gold-Plated (L817) 
6064 817 18k Gold (L817)

Inside your case back I think you should see the Longines logo and the numbers 4131 817.

Posted
Just a good clean and polish should be OK.
Your number is the serial number and inside the back you will then see a different number which is the case style.
The numbers looks like this.

1131 817 18k Gold (L817.4) 
1132 1 817 18k Gold (L817) 
4129 817 18k Gold-Plated (L817) 
4131 817 18k Gold-Plated (L817) 
6064 817 18k Gold (L817)
Inside your case back I think you should see the Longines logo and the numbers 4131 817.

it's 4131 3 817.


从我的 iPhone 发送,使用 Tapatalk
  • Like 1
  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • If the watch is new, just return it to the seller for a refund or replacement.
    • Keevo, Welcome to the group ! I'm thinking that you have some damage to the hour, and/ or minute wheel. Possibly just a bent, otherwise damaged, or missing tooth.   Your photo didn't post that I can see. I think you'll have to open it to start really finding the issue. Best, Randy
    • An industrial break cleaner , like Holts does a good job of rinsing off paraffin 
    • In cap jewels on several watches I have serviced over the years. I've recently serviced a couple of Longines movements where the cap jewels were colourless. They are a real pain. Without colour they disappear when immersed in any liquid for cleaning 😲 Not necessarily. Cousins do a 10ml bottle for £26 which will last me for years. That's just half the price of a simple Bergeon silicone cushion, so not too expensive 🤣
    • I wanted to post an update as I have two movements running really well now, 230-250 amplitude , 0.5 and under beat error, and +/-8 seconds or so. I removed the hairspring assembly in order to start over and noticed that the terminal curve between the stud and regulator arm was distorted. The stud was lower than it should be. I massaged the curve to look pretty good and reinstalled it. I followed Alex's video advice, best I could with 10x magnification, and with the regulator arm set in the middle of the curve I adjusted the stud so the spring was centered. I then made sure I could move the regulator arm the entire terminal curve without upsetting the coils. I then put it back on the Timegrapher and began closing down the regulator pins until I saw a change in amplitude which means to me that the pins were now pinching the spring. I opened them slightly and it looks good except I have a 0 on dial down, +3 on dial up but -16 on crown down.  I'm a bit stuck on how to adjust out the positional error. I also noticed a drop in amplitude, 180-200 on crown down. In the other video link I posted at about minute 26 if I remember he adjusts out positional error by manipulating  the regulator pin gap. With crown down the hairspring falls away from the pin and the rate slows so he closes the pins a bit to keep them tighter in crown down position. That means the spring is tighter on dial up as well but then he moved the regulator arm to slow the movement.  There must be some Seiko experts here that have some methods for dialing out positional errors. 
×
×
  • Create New...