Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

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kempoman
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Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by kempoman » Mon Sep 24, 2018 7:13 pm

http://www.knirim.de/a0102mod.htm
Found some interesting info here.
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passionesub
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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by passionesub » Fri Mar 15, 2019 7:19 am

Porsche or Orfina with the 7750 is very sought instead of the one with the 5100.
Both cool watches, but with the 7750 is rarer.

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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by gr8sw » Fri Mar 15, 2019 8:51 am

passionesub wrote:
Fri Mar 15, 2019 7:19 am
Porsche or Orfina with the 7750 is very sought instead of the one with the 5100.
Both cool watches, but with the 7750 is rarer.
may be rarer, but the military-issued versions used only L5100 :salute:

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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by BBK357 » Fri Mar 15, 2019 11:40 am

Why would anyone want a 7750 over A 5100? The 5100 is the ultimate chrono movement.


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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by aikiman44 » Fri Mar 15, 2019 11:58 am

5100 devotee here. Image


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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by JP Chestnut » Fri Mar 15, 2019 12:00 pm

BBK357 wrote:
Fri Mar 15, 2019 11:40 am
Why would anyone want a 7750 over A 5100? The 5100 is the ultimate chrono movement.


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The 7750 is more reliable in my experience. It's easier to service. Parts aren't getting scarce. It also has an ugly dial layout and is too thick, so neither seems clearly more desirable.

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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by foodle » Fri Mar 15, 2019 12:46 pm

L5100 for lyfe ...

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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by toxicavenger » Fri Mar 15, 2019 12:47 pm

JP Chestnut wrote:
Fri Mar 15, 2019 12:00 pm
BBK357 wrote:
Fri Mar 15, 2019 11:40 am
Why would anyone want a 7750 over A 5100? The 5100 is the ultimate chrono movement.


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The 7750 is more reliable in my experience. It's easier to service. Parts aren't getting scarce. It also has an ugly dial layout and is too thick, so neither seems clearly more desirable.
the 5100 sucks finding parts. and when you do the cost is stupid

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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by BBK357 » Fri Mar 15, 2019 2:07 pm

In my experience the 5100 is just as reliable. And it’s the best way to ever use a chrono.

Thickness? That’s all on the watch maker. It’s about the same as the 7750.

Parts for it do suck. That is the only downfall.
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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by logan2z » Fri Mar 15, 2019 2:26 pm

BBK357 wrote:
Fri Mar 15, 2019 2:07 pm
In my experience the 5100 is just as reliable. And it’s the best way to ever use a chrono.

Thickness? That’s all on the watch maker. It’s about the same as the 7750.

Parts for it do suck. That is the only downfall.
The issue doesn't seem to be just parts availability. I had a well known vintage watch repairer tell me that he will not work on the 5100 because it's a PITA and not worth it to him.

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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by toxicavenger » Fri Mar 15, 2019 2:30 pm

logan2z wrote:
Fri Mar 15, 2019 2:26 pm
BBK357 wrote:
Fri Mar 15, 2019 2:07 pm
In my experience the 5100 is just as reliable. And it’s the best way to ever use a chrono.

Thickness? That’s all on the watch maker. It’s about the same as the 7750.

Parts for it do suck. That is the only downfall.
The issue doesn't seem to be just parts availability. I had a well known vintage watch repairer tell me that he will not work on the 5100 because it's a PITA and not worth it to him.
My guy says the same thing. Most owners do not want pay the real cost/time it takes to service one.

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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by BBK357 » Fri Mar 15, 2019 3:53 pm

RGM has a 5100 guy.
Sinn will service them too.


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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by gr8sw » Fri Mar 15, 2019 5:42 pm

this guy, Shane Ede in Toronto, will also service L5100 http://torontowatchrepair.ca/
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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by toxicavenger » Fri Mar 15, 2019 5:46 pm

BBK357 wrote:
Fri Mar 15, 2019 3:53 pm
RGM has a 5100 guy.
Sinn will service them too.


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I do not know if I would send anything to rgm personally.

It still doesn't change the cost issue.

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Re: Porsche Design or Orfina (Sinn 144) style L.5100 or ETA7750

Post by kempoman » Fri Mar 15, 2019 6:33 pm

Thanks guys for the late replies. I have move on. Still own a few 5100 in my collection though. Good to know where to service them in future!
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