Recently I was lucky to be the winner of this one at an auction.
It is a cal 52, a best seller from IWC, not rare to find, but this one came in
a Borgel case, was in fantastic condition, so another pocketwatch I loved to
have I my collection.
I had already a Borgel case in my collection, a cal 57. Most Borgel cases are
in steel, also my cal 57.
In a typical mix of steel and gold.
But the cal 52 has a silver case, so extra special.
There is a great article on the Borgel by David Boettcher that you can read
here : François Borgel and Louisa Borgel - inventor and makers of the Borgel
watch case
(vintagewatchstraps.com)
Here are some pictures of my cal 52 from 1902 and my cal 57 in Borgel cases.
And the cal 57
Cleaned the