Identification/year of Speedmaster

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Recently, I’ve inherited this Omega Speedmaster and I would like to know the reference number or an approximate of the year. It was from my great grandfather, but I’m not really sure when he bought it. All I could identify was 1171-633 on the bracelet. Any help is welcomed.
 
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I'm guessing late 70s, but that's really just a guess because this general style was produced for a while. @Foo2rama is very familiar with Speedmasters from this era, so he may have a more educated estimate. However, given that parts are often replaced over time, if you really want certainty, you should make the effort to have it opened and take photos of the numbers on the movement and inside-caseback.
 
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Hello and welcome! That’s a nice heirloom you inherited! Looks like a 145.022-76 based on the dial details and lume color. Yours appears to be in nice, original condition, with the period correct bracelet.

You’ll need to get the case back opened to see the reference and serial number to ascertain the production year.

You’ll want to get the watch looked at and most likely serviced by an Omega specialist before wearing it regularly in any case. Most here would recommend against sending it to Omega for service, as they would replace many of the original parts which would greatly affect its collectibility and value.

Let us know where you are located and the collective hive can certainly recommend a qualified specialist for a sympathetic service.
Edited:
 
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Hello and welcome! That’s a nice heirloom you inherited! Looks like a 145.022-76 based on the dial details and lume color. Yours appears to be in nice, original condition, with the period correct bracelet.

You’ll need to get the case back opened and see the reference and serial number to ascertain the production year.

You’ll want to get the watch looked at and most likely serviced by an Omega specialist before wearing it regularly in any case. Most here would recommend against sending it to Omega for service, as they would replace many of the original parts which would greatly affect its collectibility and value.

Let us know where you are located and the collective hive can certainly recommend a qualified specialist for a sympathetic service.
Maybe a 145.022-78?

Long S and P...?
 
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Watch appears correct for a September of 1977 produced 145.022-76 through the 145.022-78 and into the 145.022/0022 mid 80’s.

impossible to date without the case back and serial.

hands appear to be luminova replacements but maybe not based on dial patina.

bracelet appears to be an in period 1171/633.
 
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Maybe a 145.022-78?

Long S and P...?

145.022-78 is absolutely right. I should know I have the exact same watch 😀
 
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Hello and welcome! That’s a nice heirloom you inherited! Looks like a 145.022-76 based on the dial details and lume color. Yours appears to be in nice, original condition, with the period correct bracelet.

You’ll need to get the case back opened to see the reference and serial number to ascertain the production year.

You’ll want to get the watch looked at and most likely serviced by an Omega specialist before wearing it regularly in any case. Most here would recommend against sending it to Omega for service, as they would replace many of the original parts which would greatly affect its collectibility and value.

Let us know where you are located and the collective hive can certainly recommend a qualified specialist for a sympathetic service.
Thank you for the information.
 
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Also the bezel insert is misaligned, so hopefully it is just a poor realignment on service rather than the bezel being loose.
 
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This is a great piece of family history and a great watch. It is in pretty good shape, but not so pristine that you don't want to wear it. I would have it serviced by an independent watchmaker with an Omega parts account. At that time the issue with the bezel @ErichKeane points out can be sorted. I suggest you use Google to do a site search, something like this:



I would just type it here but if you put a : next to an o on this forum you get this face 😲

if nothing turns up, start a new thread and ask for recommendations.
 
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This is a great piece of family history and a great watch. It is in pretty good shape, but not so pristine that you don't want to wear it. I would have it serviced by an independent watchmaker with an Omega parts account. At that time the issue with the bezel @ErichKeane points out can be sorted. I suggest you use Google to do a site search, something like this:



I would just type it here but if you put a : next to an o on this forum you get this face 😲

if nothing turns up, start a new thread and ask for recommendations.
I’m located in Puerto Rico and a friend recommended a Watch Service Center specialized in Swiss watches and certified by Omega. I’ll be getting an appointment so they perform a basic maintenance and check everything.