Help on a Porsche Design chronograph 7176 lemania 5100

Lancaster
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R Remontoire
Good day. Im new to this forum and have a watch that Im struggling to date. The Reference on the case back is 7176D its got the Lemania 5100 Movement (signed LEMANIA WATCH LTD) its got an Orfina signed inside case back and the Orfina logo on the clasp. Also the airplane hand in orange. I had originally thought it was 1970s but the serial number (I've blocked some of it out) looks very high. 2031****
Were they making these in the 1990s too?

any help gratefully apreciated

thank you
Agree with watchuwant that this is a put together. Other non-original parts were used in your watch as well. It looks like a generic Lemania 5100 movement was used as the rotor is branded Lemania instead of Orfina. Also the serial number is engraved in the upper automatic device bridge which Orfina didn't do. Instead there was a circular recess in the 3/4 bridge plate with a sticker showing the number. And that number would've started with 040, while yours starts with 445.
Edited:
 
A
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Good day all,

I have a few questions regarding 7176 and 7177
- is 7176 w/ military 3H dial and a tachy bezel have a non signed crown?
- I once saw a 7177 with white date wheel. Something i rarely see..a PD with whte day date wheel. Is it legit?

Thank you
 
watchyouwant
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Depends which Military ... Issued outside the back or just a replacement dial? Most issued PD's had 1-12 bezels. Not a Tachy bezel. White D/D wheels ? Which language ?
 
J
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Just hunting for date/age of watch information and stumbled across an article by Nick Lehner 4/2023. He attempted to find the serial number ranges between 1974 and 1978 in order to date the watch he bought. As per his input, serial numbers ranged from 22577 though 44358 over the course of late-74 until end of 78. Meaning there were about 21000 models built during the Lemania 5100 movement era (not including Mil models). If you take a guess using this estimated range of serial numbers (unverified) you average about 400 per month (not even sure that would make sense but maybe). This would place the 37000 serial number in the first half of 1977 as a date estimate. If anyone has a better idea as to the range of serial numbers I would be interested - have a few 7176 models needing a more accurate date estimation.
 
J
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Would anyone be able to explain to me the difference between the 7176 and 7176S vs 7176D ? Cant seem to find anything definitive. Thank you for the help in advance...
 
Passover
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7176 is in stainless steel

7176S is the PVD coated version (S = Schwarz [black])

7176D seems to be the sandblasted cousin of the 7176
https://shorturl.at/0QeJx

There is a special edition of a German Watch magazin dedicated the complete history of the Porsche watches,

1759428441910.webp


but unfortunately it's only in German language

It's available for around 10€
 
J
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Passover Passover
7176 is in stainless steel

7176S is the PVD coated version (S = Schwarz [black])

7176D seems to be the sandblasted cousin of the 7176
https://shorturl.at/0QeJx

There is a special edition of a German Watch magazin dedicated the complete history of the Porsche watches,

1759428441910.webp


but unfortunately it's only in German language

It's available for around 10€
Thank you so much. I had been hunting for this answer without success for some time. May have to buy that magazine for reference and can sort out the language barrier afterward.
Appreciate the help.
 
sweets
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I am not sure this theory is right, because all the stainless versions were blasted (none were polished or grained in any sense).
The S is the black one, that is certain.
There were other colours, a green and a grey PVD, but neither of those colours begin with D (and I think they were later, 7177s)
 
watchyouwant
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J jwd2112
Just hunting for date/age of watch information and stumbled across an article by Nick Lehner 4/2023. He attempted to find the serial number ranges between 1974 and 1978 in order to date the watch he bought. As per his input, serial numbers ranged from 22577 though 44358 over the course of late-74 until end of 78. Meaning there were about 21000 models built during the Lemania 5100 movement era (not including Mil models). If you take a guess using this estimated range of serial numbers (unverified) you average about 400 per month (not even sure that would make sense but maybe). This would place the 37000 serial number in the first half of 1977 as a date estimate. If anyone has a better idea as to the range of serial numbers I would be interested - have a few 7176 models needing a more accurate date estimation.
Not helpful. That production number is for all Lemania 5100 . Many, Many other Watch Companies used that caliber. You can not date the PD's from the movement number. Any possible Combo in Dial , Caseback , chapter ring and Center Second was made for Sale . And the later use of the Valjoux 7750 ( no 24 hour Dial at 12 ) complicates date finding as well ...
 
sweets
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watchyouwant watchyouwant
Not helpful. That production number is for all Lemania 5100 . Many, Many other Watch Companies used that caliber. You can not date the PD's from the movement number. Any possible Combo in Dial , Caseback , chapter ring and Center Second was made for Sale . And the later use of the Valjoux 7750 ( no 24 hour Dial at 12 ) complicates date finding as well ...
Although of course the PD chrono also started with the 7750 to begin with
 
watchyouwant
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sweets sweets
Although of course the PD chrono also started with the 7750 to begin with
And the last ones used 7750 again...
 
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