Horological Meandering

Hi All, In 2004, starting with the Double Split model, Lange began using little titanium inserts/sleeves in their springbar holes. Lange doesn't do this in all of their watch cases -- only larger cases (Lange 1 size and larger). What (if any) other brands...  

on their pm spring bars, especially DD and pm sky-d models ... ...  

I know Rolex uses sleeves around certain bracelet screws/pins to prevent "stretch" (I have a DD40 with those sleeves in the bracelet). I was wondering specifically about the holes in the lugs, where the springbars go, to prevent those holes from enlarging... 

Not sure about lug holes. Looking forward to other replies.

. . . at least one vintage model, the Centenary, came with 18 kt gold springbars, presumably for the same reason, to reduce metal-to-metal contact wear. Art

I loved the looks of that watch but never pursued one. Now I have to think about it again!

. . . no doubt about it! If only mine still had the original gold springbars 😔 . . . ...  

There is little public knowledge about this detail. I first read about it here: www.fratellowatches.com #gref (so on a 403.035). A friend of mine has noticed the same in a Richard Lange Jumping Seconds (ref 252.025). I have inspected few Lange in ... 

In 2004, Lange started using titanium springbar sleeves in the lug holes. Lange introduced these sleeves with the Double Split and then used them in cases that were greater than or equal to the size of a Lange 1 case. So, for example, I don't know if you'... 

Then I guess I need to check again my Langes: all of them are larger and (except from one) all of them are post-2004 yet I haven't noticed these sleeves. I might have missed them because all the watches were white metals and I was looking for a (more) con... 

Super interesting if it is!