3 Answers

HI  TO WORK OUT THE CIRCUMPHRANCE OF A CIRCLE  TAKE THE DIAMETER AND MULTIPLY IT BY  22/7   OR  3.142857 THIS WILL GIVE YOU THE TOTAL DISTANCE IF YOU DIVIDE THAT BY THE LENGTH OF YOUR BLOCKS IT WILL GIVE YOU THE REQUIRED NUMBER

KNOWING WHAT HAPPENS WHEN BUILDING IT IS BEST TO LAY THE CIRCLE OUT ON THE GROUND USING A PIECE OF STRING THEN LAY THE BLOCKS OUT AROUND THE CIRCLE AS THE BLOCKS ARE SOMETIMES  NOT ALL THE SAME EXACT LENGTH

HOPE THIS HELPS

It depends on how big you want the circle to be; and the length of the blocks.

While the case diameter is the same, the case itself has been made thinner (though it still has the same soft-iron inner case to protect the movement from the effects of magnetic link fields). The XVIII link had an 11mm case height whereas this one is now 10.8mm in diameter. It's that change that signals something new under the hood. That would be the IWC in-house 32111 link calibre with 120 hours of power reserve.