There are no hard rules and experience is our only
reference.
To answer a few of you questions.
We are talking about watches that are 30, 40 or more years old so even
unpolished comes in many conditions. This is not like factory new watches
where we stress over the most minuscule hairline scratch which is self is just
from rubbing you case with your sleeve. So for me I am calling unpolished
a watch that has not had polishing wheel applied to it which would remove
metal. The fact that the case has scratches or dings still can be
unpolished it is not "new looking". Polishing cloth to make her
look shinny will not really remove anything noticeable. May if it is done
monthly for 25 years. Again there are grades and conditions for
unpolished which would be how was it preserved meaning how much wear did it
get.
The "thick lugs" - desirable yes measurable - difficult. There
is no real standard and even with a specific model range for a 60's case vs a
70's or 80's they will be different. And as I mentioned earlier the
cases are for sure asymmetrical. If you have four identical lugs it would
be highly unusual. Again we are talking 60's through 80's I am not versed
beyond that period and as always I expect others will have even more details
than I do. So again you question of standard for case reference nothing
in concrete.
How do we judge what constitute fat and thick for which a premium may be
assigned. It is mostly having seen other examples and or having the
chance to compare models side by side. Take a friend with you how has a
nice example and compare to the one with the seller. The examples I
showed above was not a good example vs a bad one. The example I showed as
one that may have been polished is an excellent example with fat lugs. It
had bevels and was great example.
Look at the lug holes are they circular or oblong
Look at the bevel on the case does it taper as it reaches the crown or is it
more of an even distribution across the side
How close is the lug hole to the bevel and to the edge of the lug.
How sharp are the edges on the underside.
How much meat is around the crowns is it a tight fit
If the case look new and unworn and it is 30 years old it may be too good to be
true
Too many aspects to consider. Like with papers we don't wear them and
unpolished case is nice find but it does not mean you put it in a safe.
It just means you don't send it in for polishing and enjoy it.
Bill