The IWC 53T 19 watch movement is equipped with early samples featuring a 3/4 plate design, which was later improved with a separate barrel bridge. It utilizes a straight lever with only one banking pin, a design principle akin to the Glashutte lever escapement. The lever includes a hole instead of a pin, which contributes to reduced weight. Function-wise, the CLDD movement offers manual winding capability, a sweep second hand, and both day and date features. The day can be set by adjusting +/- 24 hours, while the date can be quickly set by repeatedly pulling the crown.