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Ok i'll bite.
From a tinkering point of view my favorite movement is the 70xx, Why? because they are basic and easy to work on, parts are easy to come by and not silly expensive. The 7s movements are much the same but imo seem to lack in quality.

Having said all that, i've just discovered the Orient 487. It appears to be a quality 7s but with the auto wind mech very akin to a seiko 6 series, and ive since discovered that some Seiko 7s parts are a direct fit.
 

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Ok i'll bite.
From a tinkering point of view my favorite movement is the 70xx, Why? because they are basic and easy to work on, parts are easy to come by and not silly expensive. The 7s movements are much the same but imo seem to lack in quality.

Having said all that, i've just discovered the Orient 487. It appears to be a quality 7s but with the auto wind mech very akin to a seiko 6 series, and ive since discovered that some Seiko 7s parts are a direct fit.
I was able to replace the center wheel in an Orient with one from a 7005.
 

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I really like the 7A28/38, the first analog quartz chronograph movements and still the best in terms of function, quality and robustness.
Nothing over the past 31 years has come close.
 

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I really like the 7A28/38, the first analog quartz chronograph movements and still the best in terms of function, quality and robustness.
Nothing over the past 31 years has come close.
Agreed one of my favourites.


The 7548 family, accurate, easy to maintain and plenty of spares.

The 6105/6309 for the same reasons as the 7548 :)
 

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I love the 5606 because of the manual wind and hacking. One day I'll fit it into a 6309 divers case. Only downside is the day date quickset wheel. Can't have it all I guess. Close second is the 4006 & 6139 because even rough examples seem to run somehow!
 
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