I am so happy that finally this ref 5503 arrived in the collection.
It was in the catalogues until 1998/1999.
I saw a price in 1992 : 23900 DM.
To compare, the 3741 in steel came at 2900 DM, the 3741 in gold came at 10500
DM.
The 5503 was a limited edition of 1000. I wonder if all were made.
It was a pocketwatch with calendar function.
It has the cal 9721 inside a heavy sterling silver case.