springbar question

[ayres]

hi everyone, i once had a sub nd (loved the lug holes), and now have an newer exp 2 without lug holes. so i understand the basic difference between these two types of springbars.

but what about the sport models that have sel & lug holes? do these models have the same springbars that are found on the sub no date? i'm aware that those early solid end-links do not have a cut out for removing the springbars from the underside of the watch - as is the sel now currently provided... so the only way to remove the band is through the lug hole.

http://www.ofrei.com/page_155.html

this above link shows two springbar images at the top. i assume the first model is used in rolex cases with lug holes.

also, what are the pros and cons to each type of springbar (eg integrity & longevity)? cheers & thanks in advance,

ayres