A Swatch Limited Edition GZ900 Seasons Greetings Advent Calendar, issued in 1997. doors unopened

This is a Swatch Limited Edition GZ900 Seasons Greetings Advent Calendar, issued in 1997.

The advent calendar set includes a Swatch watch and painted metal Christmas charms/pendants behind the other doors
It was released as a limited edition, typically numbered out of 20,000 or 30,000 units.
The watch itself features a hinged cover that opens to reveal a spiral decoration and the watch face underneath.
The model reference number for this special edition is GZ900.